Pre-acceptance Test Roll Scans

This page links to sample scans of various roll types from the Stanford Library piano-roll collections, mostly from the 8000-roll Condon collection. Click on roll thumbnail images in the list below to view more information about each roll as well as links to the original scans and analyses of the scans. Note that the original full-color uncompressed TIFFs are 1–6 GB.

Rolls are grouped by format. Click on a format in the list below to move to the rolls for that format.

[ Ampico | Duo-Art | Red | Green | Licensee | Organ | Metrostyle | QRS | Other | Calibration ]

To see detailed information about a roll, click on its icon in the list. Note that the "Automatic analysis of scan" link at the bottom of most roll entries gives a detailed, automatically generated analysis of the scan.

Here is a spreadsheet summary of the analysis:

Frame duplications

16 of the roll scans contain frame-duplication errors caused by an earlier version of the scanning software (and camera driver), where pieces of the images are duplicated and over-write frames missing or dropped when recording the images. Consecutive frame-duplication errors are marked in the reduced JPEG images, but not in the original TIFF. The marks consist of a solid color covering 1/4 of the problemmatic frame. For each adjacent frame, the duplication marker shifts to the other side of the image. Here is an example from the Pennino roll where there are 10 successive duplicate frames (representing 1 physical inch on the rolls):

Most commonly there will be a burst of shorter dupliciation errors at the start of a scan, such as this example from the same roll:

Three colors are cycled through to mark the frame duplications to separate separate duplcation of a different frame, so the above image contains six separate duplication events, each two to three frames in length. Scans from December 2017 and later do not (should not) have duplication errors since the scanning software will abort scanning if any are detected.

Ampico Rolls

Ampico rolls were produced starting in 1913 and are the other most common American roll type. Click on the roll thumbnails below to view more information about each roll.
65543 — Sonata in D major, Hob. XVI:37 Haydn/Norfleet
Composer Haydn
Performer Helen Norfleet
Tempo 85
Format ampicoA
Type original
Catalog # Ampico 65543-H
Date 1925
Original Price 2.00
Comments The green line on the roll indicates the expression (dynamics) encoded on the roll. See the article The Great Green Line Mystery by Vernon Brown in The AMICA Bulletin 29/6 (Nov./Dec. 1992).

Also found at UNT.

Physical Notes Contains large section in the middle of the roll that needs repair in order to scan properly. Close to end of roll on right, there are edge tears which should be fixed to recover expression data:

,

Scan Notes Damaged region in middle of roll not suitable for note extraction. This is most of the second movement. Black regions are a hand guiding the loose fragments over the scanning tube.,
DPI width: 301.39 pixels/inch
length: 300.25 ± 0.21 pixels/inch
Roll Length 268710 pixels, 74.57 ± 0.05 feet
Scan Date 2017/11/16
Anchor #norfleet
Images
  • BZIP2 compressed 300-dpi uncompressed full-color TIFF — original scan, very large file in note-processing orientation (most rolls except red rolls will be left/right mirrored with time at top of file and bass notes on left side of image).
  • leader — The first 4096 pixel lines of the roll.
  • 73-dpi JPEG — Smaller resolution than above, but easier to view on the web, in visual orientation (leader of most rolls except red rolls will be at the bottom).
  • Annotated 73-dpi JPEG — Automatically analysis of the roll structure, in visual orientation. See the automatic analysis page for more detailed image markups.
Analyses Color-channel intensity histograms (data)
Automatic analysis of scan
Listen

Direct rendering of the scan to MIDI then rendered to MP3 with timidity (notes only with no expression and pitch is estimated).

Duplication Errors 2 frame repeat groups in image:
  • • 2 repeated frames at rows 186900 and 186930.
  • • 2 repeated frames at rows 262170 and 262200.
65543 — Sonata in D major, mvmt 1 w/ repairs Haydn/Norfleet
Composer Haydn
Performer Helen Norfleet
Tempo 85
Format ampicoA
Type original
Catalog # Ampico 65543-H
Date 1925
Original Price 2.00
Comments This is a test rescan after repairing some holes after making repairs near the start of the second movmenet.
Scan Notes NB: This is only a partial scan.,
DPI width: 301.39 pixels/inch
length: 300.25 ± 0.21 pixels/inch
Roll Length 116700 pixels, 32.38 ± 0.02 feet
Scan Date 2017/12/06
Anchor #norfleet2
Images
  • BZIP2 compressed 300-dpi uncompressed full-color TIFF — original scan, very large file in note-processing orientation (most rolls except red rolls will be left/right mirrored with time at top of file and bass notes on left side of image).
  • leader — The first 4096 pixel lines of the roll.
  • 100-dpi JPEG — Smaller resolution than above, but easier to view on the web, in visual orientation (leader of most rolls except red rolls will be at the bottom).
  • Annotated 100-dpi JPEG — Automatically analysis of the roll structure, in visual orientation. See the automatic analysis page for more detailed image markups.
Analyses Automatic analysis of scan
Listen

Direct rendering of the scan to MIDI then rendered to MP3 with timidity (notes only with no expression and pitch is estimated).

61391 — Inspector's Ampico Test Roll
Composer [none]
Performer [none]
Tempo 70
Format ampicoA
Type original
Catalog # Ampico 61391H
Date 1923
DPI width: 301.39 pixels/inch
length: 300.25 ± 0.21 pixels/inch
Roll Length 110880 pixels, 30.77 ± 0.02 feet
Scan Date 2017/11/22
Anchor #ampico_test_roll2
Images
  • BZIP2 compressed 300-dpi uncompressed full-color TIFF — original scan, very large file in note-processing orientation (most rolls except red rolls will be left/right mirrored with time at top of file and bass notes on left side of image).
  • leader — The first 4096 pixel lines of the roll.
  • 100-dpi JPEG — Smaller resolution than above, but easier to view on the web, in visual orientation (leader of most rolls except red rolls will be at the bottom).
  • Annotated 100-dpi JPEG — Automatically analysis of the roll structure, in visual orientation. See the automatic analysis page for more detailed image markups.
Analyses Automatic analysis of scan
Listen

Direct rendering of the scan to MIDI then rendered to MP3 with timidity (notes only with no expression and pitch is estimated).

Ampico 70601 — Ampico Test Roll: Note Compensation ONLY, 1929 Service Manual
Composer [none]
Performer [none]
Format ampicoB
Type original
Catalog # Ampico 70601
Comments Contains a one-page instruction sheet in box. The AMICA Bulletin March/April 1996, 33/2 Keystone ad on page 116: mentions Ampico roll #70601 as being a "Note Compensation roll for adjusting the Model "B" pneumatics".
DPI width: 301.39 pixels/inch
length: 300.25 ± 0.21 pixels/inch
Roll Length 61020 pixels, 16.93 ± 0.01 feet
Scan Date 2017/11/21
Images
  • BZIP2 compressed 300-dpi uncompressed full-color TIFF — original scan, very large file in note-processing orientation (most rolls except red rolls will be left/right mirrored with time at top of file and bass notes on left side of image).
  • leader — The first 4096 pixel lines of the roll.
  • 100-dpi JPEG — Smaller resolution than above, but easier to view on the web, in visual orientation (leader of most rolls except red rolls will be at the bottom).
  • Annotated 100-dpi JPEG — Automatically analysis of the roll structure, in visual orientation. See the automatic analysis page for more detailed image markups.
Analyses Automatic analysis of scan
Color-channel intensity histograms (data)
Listen

Direct rendering of the scan to MIDI then rendered to MP3 with timidity (notes only with no expression and pitch is estimated).

Ampico 70403-H — Ampico Test Roll for use with Service Manual 1929
Format ampicoB
Type original
Catalog # Ampico 70403-H
Original Price 2.00
Comments For the Ampico Model "B".
DPI width: 301.39 pixels/inch
length: 300.25 ± 0.21 pixels/inch
Roll Length 192870 pixels, 53.53 ± 0.03 feet
Scan Date 2017/11/21
Anchor #70403H
Images
  • BZIP2 compressed 300-dpi uncompressed full-color TIFF — original scan, very large file in note-processing orientation (most rolls except red rolls will be left/right mirrored with time at top of file and bass notes on left side of image).
  • leader — The first 4096 pixel lines of the roll.
  • 100-dpi JPEG — Smaller resolution than above, but easier to view on the web, in visual orientation (leader of most rolls except red rolls will be at the bottom).
  • Annotated 100-dpi JPEG — Automatically analysis of the roll structure, in visual orientation. See the automatic analysis page for more detailed image markups.
Analyses Automatic analysis of scan
Color-channel intensity histograms (data)
Listen

Direct rendering of the scan to MIDI then rendered to MP3 with timidity (notes only with no expression and pitch is estimated).

Duplication Errors 2 frame repeat groups in image:
  • • 2 repeated frames at rows 109200 and 109230.
  • • 6 repeated frames at rows 118830, 118860, 118890, 118920, 118950 and 118980.

Duo-Art Rolls

Duo-Art rolls were produced by the Aeolean Company, which was one of the two dominant player-piano companies in the United States. Click on the roll thumbnails below to view more information about each roll.
47 — Nocturne in D-flat major, Op. 27, no. 2 Chopin/Pachmann
Composer Fryderyk Chopin
Performer Vladimir de Pachmann
Tempo 90
Format duoart
Type recut
Catalog # Duo-Art 047
Recutter Harold L. Powell, North Hollywood, California, U.S.A.
DPI width: 301.39 pixels/inch
length: 300.25 ± 0.21 pixels/inch
Roll Length 203940 pixels, 56.6 ± 0.03 feet
Scan Date 2017/11/22
Anchor #nocturne
Images
  • BZIP2 compressed 300-dpi uncompressed full-color TIFF — original scan, very large file in note-processing orientation (most rolls except red rolls will be left/right mirrored with time at top of file and bass notes on left side of image).
  • leader — The first 4096 pixel lines of the roll.
  • 94-dpi JPEG — Smaller resolution than above, but easier to view on the web, in visual orientation (leader of most rolls except red rolls will be at the bottom).
  • Annotated 94-dpi JPEG — Automatically analysis of the roll structure, in visual orientation. See the automatic analysis page for more detailed image markups.
Analyses Color-channel intensity histograms (data)
Automatic analysis of scan
Listen

Direct rendering of the scan to MIDI then rendered to MP3 with timidity (notes only with no expression and pitch is estimated).

Duplication Errors 6 frame repeat groups in image:
  • • 3 repeated frames at rows 30, 60 and 90.
  • • 2 repeated frames at rows 150 and 180.
  • • 3 repeated frames at rows 210, 240 and 270.
  • • 3 repeated frames at rows 810, 840 and 870.
  • • 2 repeated frames at rows 23370 and 23400.
  • • 2 repeated frames at rows 61230 and 61260.
Salesmen's Demonstration Roll various/various
Composer Grieg, Schubert, Wagner, Rachmaninoff
Performer Grainger, Cortot, Friedman, De Greef
Tempo 70, 75, 80, 70, 80
Format duoart
Type original
Catalog # [none]
Comments Contents:
  • • A selection of Anitra's Dance from Peer Gynt Suite by Grieg, played by Percy Grainger
  • • Schubert's Litany for All Souls Day played by Alfred Cortot and interpreted by Percy A. Scholes.
  • • Section from Wagner's Magic Fire Music played by Ignaz Friedman.
  • • Rachmaninoff's Prelude in C sharp minor played by unknown.
  • • Section of the first movement of Schubert's Unfinished Symphony played by unknown.
  • • Puck by Grieg, played by De Greef.
Physical Notes Probably ex libris with due dates "2 JAN 1972" and "4 JUN 1972 stamped underneath the box top. End of the roll contains photographs of people associated with Duo-Art.
DPI width: 301.39 pixels/inch
length: 300.25 ± 0.21 pixels/inch
Roll Length 230400 pixels, 63.94 ± 0.04 feet
Scan Date 2017/11/22
Anchor #salesman
Images
  • BZIP2 compressed 300-dpi uncompressed full-color TIFF — original scan, very large file in note-processing orientation (most rolls except red rolls will be left/right mirrored with time at top of file and bass notes on left side of image).
  • leader — The first 4096 pixel lines of the roll.
  • 85-dpi JPEG — Smaller resolution than above, but easier to view on the web, in visual orientation (leader of most rolls except red rolls will be at the bottom).
  • Annotated 85-dpi JPEG — Automatically analysis of the roll structure, in visual orientation. See the automatic analysis page for more detailed image markups.
Analyses Color-channel intensity histograms (data)
Automatic analysis of scan
Listen

Direct rendering of the scan to MIDI then rendered to MP3 with timidity (notes only with no expression and pitch is estimated).

Duo-Art Test Roll No. 3
Composer [none]
Performer [none]
Tempo 70
Format duoart
Type original
Catalog # [none]
Comments Inside top of box is the text: TO INSURE PERFECT TRACKING OF MUSIC ROLLS. See that music roll is loosely wound on spool, then hold in the hand with the slotted end down. Let roll drop lightly two or three times into the palm of the other hand, thus throwing the entire music sheet against the right flange of spool. Tighten roll in the usual manner and it is ready to play.

The AMICA Bulletin March/April 1996, 33/2 Keystone ad: mentions this roll on page 116: as being from 1927.

Scan Notes Light band of color on right side of roll is due to sunlight.
DPI width: 301.39 pixels/inch
length: 300.25 ± 0.21 pixels/inch
Roll Length 12220 pixels, 3.39 feet
Scan Date 2017/11/21
Anchor #testno3
Images
  • BZIP2 compressed 300-dpi uncompressed full-color TIFF — original scan, very large file in note-processing orientation (most rolls except red rolls will be left/right mirrored with time at top of file and bass notes on left side of image).
  • leader — The first 4096 pixel lines of the roll.
  • 100-dpi JPEG — Smaller resolution than above, but easier to view on the web, in visual orientation (leader of most rolls except red rolls will be at the bottom).
  • Annotated 100-dpi JPEG — Automatically analysis of the roll structure, in visual orientation. See the automatic analysis page for more detailed image markups.
Analyses Color-channel intensity histograms (data)
Automatic analysis of scan
Listen

Direct rendering of the scan to MIDI then rendered to MP3 with timidity (notes only with no expression and pitch is estimated).

Handcut Duo-Art Dynamic Tester
Composer [none]
Performer [none]
Tempo [none]
Format duoart
Type handcut
Catalog # [none]
Date 16 November 1994
Comments Handmade roll by Denis Condon for checking Duo-Art expression on player piano. Also as the note in red marker "a few Welte tests too // 21.4.98" Welte test is taped to end of duo-art test.
Scan Notes related to druid hq911yh4385.
DPI width: 301.39 pixels/inch
length: 300.25 ± 0.21 pixels/inch
Roll Length 111870 pixels, 31.04 ± 0.02 feet
Scan Date 2017/11/22
Anchor #duoarttester1994
Images
  • BZIP2 compressed 300-dpi uncompressed full-color TIFF — original scan, very large file in note-processing orientation (most rolls except red rolls will be left/right mirrored with time at top of file and bass notes on left side of image).
  • leader — The first 4096 pixel lines of the roll.
  • 100-dpi JPEG — Smaller resolution than above, but easier to view on the web, in visual orientation (leader of most rolls except red rolls will be at the bottom).
  • Annotated 100-dpi JPEG — Automatically analysis of the roll structure, in visual orientation. See the automatic analysis page for more detailed image markups.
Analyses Automatic analysis of scan
Listen

Direct rendering of the scan to MIDI then rendered to MP3 with timidity (notes only with no expression and pitch is estimated).

Home Made Test Roll
Composer [none]
Performer [none]
Tempo [none]
Format duoart
Type handcut
Catalog # [none]
Comments Created by Dennis Condon
Scan Notes Related to roll in druid km278ct2792
DPI width: 301.39 pixels/inch
length: 300.25 ± 0.21 pixels/inch
Roll Length 87780 pixels, 24.36 ± 0.01 feet
Scan Date 2017/11/22
Anchor #homemade2
Images
  • BZIP2 compressed 300-dpi uncompressed full-color TIFF — original scan, very large file in note-processing orientation (most rolls except red rolls will be left/right mirrored with time at top of file and bass notes on left side of image).
  • leader — The first 4096 pixel lines of the roll.
  • 100-dpi JPEG — Smaller resolution than above, but easier to view on the web, in visual orientation (leader of most rolls except red rolls will be at the bottom).
  • Annotated 100-dpi JPEG — Automatically analysis of the roll structure, in visual orientation. See the automatic analysis page for more detailed image markups.
Analyses Automatic analysis of scan
Listen

Direct rendering of the scan to MIDI then rendered to MP3 with timidity (notes only with no expression and pitch is estimated).

Duo-Art Dynamic tests 25.12.1987
Composer [none]
Performer [none]
Tempo 80
Format duoart
Type handcut
Catalog # [none]
Date 1987
Comments Text on roll: Welte (after the Duo Art) // for cres tests will gauge (Licensee) Special Welte Cresc Text // Licensee mode - Tempo 80 // N.B. Go to thie tests after the red line.
DPI width: 301.39 pixels/inch
length: 300.25 ± 0.21 pixels/inch
Roll Length 51990 pixels, 14.42 ± 0.01 feet
Scan Date 2017/11/22
Anchor #hand1987
Images
  • BZIP2 compressed 300-dpi uncompressed full-color TIFF — original scan, very large file in note-processing orientation (most rolls except red rolls will be left/right mirrored with time at top of file and bass notes on left side of image).
  • leader — The first 4096 pixel lines of the roll.
  • 100-dpi JPEG — Smaller resolution than above, but easier to view on the web, in visual orientation (leader of most rolls except red rolls will be at the bottom).
  • Annotated 100-dpi JPEG — Automatically analysis of the roll structure, in visual orientation. See the automatic analysis page for more detailed image markups.
Analyses Automatic analysis of scan
Listen

Direct rendering of the scan to MIDI then rendered to MP3 with timidity (notes only with no expression and pitch is estimated).

Green Welte Rolls

"Green roll" are usually green-hue Welte-Mignon rolls produced from 1922 to 1932 in Freiburg, Germany by Welte & Sons. They have 98 rows of holes spaced 9 per inch, and a width of 11.25 inches. Click on the roll thumbnails below to view more information about each roll.
3414 — Variations and Fugue Op. 134, part II Reger/Kwast-Hodapp
Composer Max Reger
Performer Frieda Kwast-Hodapp
Tempo [75]
Format greenwelte
Type original
Catalog # Welte-Mignon 3414
Comments Youtube recording of roll
SUL CALL # CONDON ROLL 790
SUL Barcode 36105225788103
DPI width: 301.39 pixels/inch
length: 300.25 ± 0.21 pixels/inch
Roll Length 331560 pixels, 92.02 ± 0.06 feet
Scan Date 2017/11/16
Anchor #hodapp
Images
  • BZIP2 compressed 300-dpi uncompressed full-color TIFF — original scan, very large file in note-processing orientation (most rolls except red rolls will be left/right mirrored with time at top of file and bass notes on left side of image).
  • leader — The first 4096 pixel lines of the roll.
  • 58-dpi JPEG — Smaller resolution than above, but easier to view on the web, in visual orientation (leader of most rolls except red rolls will be at the bottom).
  • Annotated 58-dpi JPEG — Automatically analysis of the roll structure, in visual orientation. See the automatic analysis page for more detailed image markups.
Analyses Color intensity histograms (data)
Automatic analysis of scan
Listen

Direct rendering of the scan to MIDI then rendered to MP3 with timidity (notes only with no expression and pitch is estimated).

Duplication Errors 2 frame repeat groups in image:
  • • 5 repeated frames at rows 93420, 93450, 93480, 93510 and 93540.
  • • 2 repeated frames at rows 281790 and 281820.
3414 — Variations and Fugue w/ repairs Reger/Kwast-Hodapp
Composer Max Reger
Performer Frieda Kwast-Hodapp
Tempo [75]
Format greenwelte
Type original
Catalog # Welte-Mignon 3414
Comments Youtube recording of roll
Scan Notes Re-scan after repairs to edges of roll.
SUL CALL # CONDON ROLL 790
SUL Barcode 36105225788103
DPI width: 301.39 pixels/inch
length: 300.25 ± 0.21 pixels/inch
Roll Length 343920 pixels, 95.45 ± 0.06 feet
Scan Date 2017/12/06
Anchor #hodapp2
Images
  • BZIP2 compressed 300-dpi uncompressed full-color TIFF — original scan, very large file in note-processing orientation (most rolls except red rolls will be left/right mirrored with time at top of file and bass notes on left side of image).
  • leader — The first 4096 pixel lines of the roll.
  • 58-dpi JPEG — Smaller resolution than above, but easier to view on the web, in visual orientation (leader of most rolls except red rolls will be at the bottom).
  • Annotated 58-dpi JPEG — Automatically analysis of the roll structure, in visual orientation. See the automatic analysis page for more detailed image markups.
Analyses Automatic analysis of scan
Listen

Direct rendering of the scan to MIDI then rendered to MP3 with timidity (notes only with no expression and pitch is estimated).

Repitition [sic] Test Roll (Welte)
Composer [none]
Performer [none]
Tempo [none]
Format greenwelte
Type original
Catalog # [none]
Comments This roll plays each of the 88 notes of the key-board from lowest to highest. Has the number "25326" stamped at the end of the roll. Leader has the following text, dated 1-7-1967 (probably by Denis Condon): This is test number eleven from a Welte-Mignon 98er test roll. It is the second half (and the last part) of the original roll. It may be used as a repitition [sic] test for all player-pianos taking rolls 11-1/4" wide at a scale of nine ports to the inch according to the Buffalo Convention of 1911. The re-roll port at the end will operate Welte 98ers and Aeolian players.
Physical Notes Left flange rim is 25% missing. Notice the numerous tears on both edges of the roll. In this case they are not a problem since they do not cover or remove any note holes.
Scan Notes The aberration at the end of the roll is due to not stopping the scanning while re-winding the roll.
SUL CALL # CONDON ROLL 1092
SUL Barcode 36105225773725
DPI width: 301.39 pixels/inch
length: 300.25 ± 0.21 pixels/inch
Roll Length 126870 pixels, 35.21 ± 0.02 feet
Scan Date 2017/11/21
Anchor #greentest
Images
  • BZIP2 compressed 300-dpi uncompressed full-color TIFF — original scan, very large file in note-processing orientation (most rolls except red rolls will be left/right mirrored with time at top of file and bass notes on left side of image).
  • leader — The first 4096 pixel lines of the roll.
  • 100-dpi JPEG — Smaller resolution than above, but easier to view on the web, in visual orientation (leader of most rolls except red rolls will be at the bottom).
  • Annotated 100-dpi JPEG — Automatically analysis of the roll structure, in visual orientation. See the automatic analysis page for more detailed image markups.
Analyses Automatic analysis of scan
Color-channel intensity histograms (data)
Listen

Direct rendering of the scan to MIDI then rendered to MP3 with timidity (notes only with no expression and pitch is estimated).

Welte-Mignon Licensee Rolls

Licensee rolls are mostly Welte rolls for the American market. Click on the roll thumbnails below to view more information about each roll.
2733 — Selections from Children's Corner Debussy
Composer Claude Debussy
Performer Claude Debussy
Format licensee
Type original
Catalog # DeLuxe C-2733A
Original Price $2.00
Comments Children's Corner: (3) Serenade of the Doll & (4) The Snow is Dancing
DPI width: 301.39 pixels/inch
length: 300.25 ± 0.21 pixels/inch
Roll Length 202260 pixels, 56.13 ± 0.03 feet
Scan Date 2017/11/16
Anchor #snow
Images
  • BZIP2 compressed 300-dpi uncompressed full-color TIFF — original scan, very large file in note-processing orientation (most rolls except red rolls will be left/right mirrored with time at top of file and bass notes on left side of image).
  • leader — The first 4096 pixel lines of the roll.
  • 97-dpi JPEG — Smaller resolution than above, but easier to view on the web, in visual orientation (leader of most rolls except red rolls will be at the bottom).
  • Annotated 97-dpi JPEG — Automatically analysis of the roll structure, in visual orientation. See the automatic analysis page for more detailed image markups.
Analyses Color intensity histograms (data)
Automatic analysis of scan
Listen

Direct rendering of the scan to MIDI then rendered to MP3 with timidity (notes only with no expression and pitch is estimated).

Duplication Errors 1 frame repeat group in image:
  • • 3 repeated frames at rows 44970, 45000 and 45030.
2734 — D'un Cahier d'Esquisses Debussy
Composer Claude Debussy
Performer Claude Debussy
Tempo 80
Score As a PDF
Format licensee
Type recut
Catalog # Welte-Mignon 2734
Recutter Transcribed from the original Red Welte roll by Richard Tonnesen.
Copyright 1985 Custom Music Rolls, Richardson, TX, U.S.A.
Comments Transcription changes roll format from red roll to licensee. Has the date 9/25/84 punched onto the end of the roll.
SUL CALL # CONDON ROLL 660
SUL Barcode 36105225786396
DPI width: 301.39 pixels/inch
length: 300.25 ± 0.21 pixels/inch
Roll Length 156990 pixels, 43.57 ± 0.03 feet
Scan Date 2017/11/16
Anchor #tonnesen
Images
  • BZIP2 compressed 300-dpi uncompressed full-color TIFF — original scan, very large file in note-processing orientation (most rolls except red rolls will be left/right mirrored with time at top of file and bass notes on left side of image).
  • leader — The first 4096 pixel lines of the roll.
  • 100-dpi JPEG — Smaller resolution than above, but easier to view on the web, in visual orientation (leader of most rolls except red rolls will be at the bottom).
  • Annotated 100-dpi JPEG — Automatically analysis of the roll structure, in visual orientation. See the automatic analysis page for more detailed image markups.
Analyses Color intensity histograms (data)
Automatic analysis of scan
Listen

Direct rendering of the scan to MIDI then rendered to MP3 with timidity (notes only with no expression and pitch is estimated).

Duplication Errors 1 frame repeat group in image:
  • • 4 repeated frames at rows 52050, 52080, 52110 and 52140
Official test roll for the Welte-Mignon Licensee
Composer [none]
Performer [none]
Tempo 80
Format licensee
Type original
Catalog # [none]
Comments Note stamped in capital letters after header: Before testing, take out bottom // panel of piano, where Welte- // Mignon action is located, and // see that both treble and bass // stop valves on top of expres- // sion pneumatics seat properly. AUTO PNEUMATIC // ACTION COMPANY // 51st ST. and 12th AVENUE.
SUL CALL # CONDON ROLL 558
SUL Barcode 36105225773733
DRUID nb834nm6635
DPI width: 301.39 pixels/inch
length: 300.25 ± 0.21 pixels/inch
Roll Length 148950 pixels, 41.34 ± 0.02 feet
Scan Date 2017/11/22
Anchor #official_test_roll
Images
  • BZIP2 compressed 300-dpi uncompressed full-color TIFF — original scan, very large file in note-processing orientation (most rolls except red rolls will be left/right mirrored with time at top of file and bass notes on left side of image).
  • leader — The first 4096 pixel lines of the roll.
  • 100-dpi JPEG — Smaller resolution than above, but easier to view on the web, in visual orientation (leader of most rolls except red rolls will be at the bottom).
  • Annotated 100-dpi JPEG — Automatically analysis of the roll structure, in visual orientation. See the automatic analysis page for more detailed image markups.
Analyses Automatic analysis of scan
Listen

Direct rendering of the scan to MIDI then rendered to MP3 with timidity (notes only with no expression and pitch is estimated).

Welte-Mignon [DeLuxe] Test Roll
Tempo [none]
Format licensee
Type original
Catalog # [none]
Comments Contains a one-page list of the tests on the roll.
Scan Notes Light band on right edge of paper is due to sunlight.
SUL CALL # CONDON ROLL 935
SUL Barcode 36105225773709
DPI width: 301.39 pixels/inch
length: 300.25 ± 0.21 pixels/inch
Roll Length 131640 pixels, 36.53 ± 0.02 feet
Scan Date 2017/11/21
Anchor #deluxetest
Images
  • BZIP2 compressed 300-dpi uncompressed full-color TIFF — original scan, very large file in note-processing orientation (most rolls except red rolls will be left/right mirrored with time at top of file and bass notes on left side of image).
  • leader — The first 4096 pixel lines of the roll.
  • 100-dpi JPEG — Smaller resolution than above, but easier to view on the web, in visual orientation (leader of most rolls except red rolls will be at the bottom).
  • Annotated 100-dpi JPEG — Automatically analysis of the roll structure, in visual orientation. See the automatic analysis page for more detailed image markups.
Analyses Automatic analysis of scan
Color-channel intensity histograms (data)
Listen

Direct rendering of the scan to MIDI then rendered to MP3 with timidity (notes only with no expression and pitch is estimated).

Red Welte Rolls

"Red rolls" are usually red-colored Welte-Mignon rolls produced by Welte & Sons. They invented paper rolls for playing organs in the 1880's, and they were the first company to record live piano performances, starting in 1904 on these red rolls. Red rolls were produced in Germany from 1905 to 1932, and in Poughkeepsie, New York from 1913 to 1920. New York rolls sometimes have a cloth leader. They have 100 rows of holes at 8 holes per inch, with the width of the roll being about 12.9 inches. Click on the roll thumbnails below to view more information about each roll.
2733 — Children's Corner Debussy
Composer Claude Debussy
Performer Claude Debussy
Tempo [none]
Score As a PDF
Format redwelte
Type original
Catalog # Welte-Mignon 2733
Date 1913
Comments Has the cutting date "9 Nov 1923" written at the end of the roll.
SUL CALL # CONDON ROLL 584
SUL Barcode 36105225785612
DRUID none
DPI width: 301.39 pixels/inch
length: 300.25 ± 0.21 pixels/inch
Roll Length 521490 pixels, 144.73 ± 0.1 feet
Scan Date 2017/11/22
Anchor #corner
Images
  • BZIP2 compressed 300-dpi uncompressed full-color TIFF — original scan, very large file in note-processing orientation (most rolls except red rolls will be left/right mirrored with time at top of file and bass notes on left side of image).
  • leader — The first 4096 pixel lines of the roll.
  • 37-dpi JPEG — Smaller resolution than above, but easier to view on the web, in visual orientation (leader of most rolls except red rolls will be at the bottom).
  • Annotated 37-dpi JPEG — Automatically analysis of the roll structure, in visual orientation. See the automatic analysis page for more detailed image markups.
Analyses Automatic analysis of scan
Listen

Direct rendering of the scan to MIDI then rendered to MP3 with timidity (notes only with no expression and pitch is estimated).

2736 — La plus que lente Debussy
Composer Claude Debussy
Performer Claude Debussy
Format redwelte
Type recut
Catalog # Welte-Mignon 2736
Recutter Musikwerkstadt Monschau
Scan Notes Notice that the label appears upside-down in the "visual" orientation in the JPEG version of the scan. This is correct, since it is more important to have bass notes on the left (as they would be seen when looking at the roll being played on a red Welte roll).
DPI width: 251.48 pixels/inch
length: 300.32 ± 0.19 pixels/inch
Roll Length 133170 pixels, 36.95 ± 0.02 feet
Scan Date 2017/11/22
Anchor #monschau
Images
  • BZIP2 compressed 300-dpi uncompressed full-color TIFF — original scan, very large file in note-processing orientation (most rolls except red rolls will be left/right mirrored with time at top of file and bass notes on left side of image).
  • leader — The first 4096 pixel lines of the roll.
  • 100-dpi JPEG — Smaller resolution than above, but easier to view on the web, in visual orientation (leader of most rolls except red rolls will be at the bottom).
  • Annotated 100-dpi JPEG — Automatically analysis of the roll structure, in visual orientation. See the automatic analysis page for more detailed image markups.
Analyses Color-channel intensity histograms (data)
Automatic analysis of scan
Listen

Direct rendering of the scan to MIDI then rendered to MP3 with timidity (notes only with no expression and pitch is estimated).

Modified Test Roll for red rolls
Composer [none]
Performer [none]
Tempo [none]
Format redwelte
Type original
Catalog # [none]
Physical Notes On beige paper (not red). Cut from a longer test. Not on red paper. Contains lines for each hole row. Leader was added later (so may be a partial test roll). The note on the leader says Welte-Mignon modified test-roll. This roll cannot be used to adjust the Mignon expression mechanism. Note names are written in German on next to the holes for each pitch.
SUL CALL # CONDON ROLL 1367
SUL Barcode 36105225773782
DPI width: 251.48 pixels/inch
length: 300.32 ± 0.19 pixels/inch
Roll Length 84780 pixels, 23.52 ± 0.01 feet
Scan Date 2017/11/22
Anchor #redrolltest2
Images
  • BZIP2 compressed 300-dpi uncompressed full-color TIFF — original scan, very large file in note-processing orientation (most rolls except red rolls will be left/right mirrored with time at top of file and bass notes on left side of image).
  • leader — The first 4096 pixel lines of the roll.
  • 100-dpi JPEG — Smaller resolution than above, but easier to view on the web, in visual orientation (leader of most rolls except red rolls will be at the bottom).
  • Annotated 100-dpi JPEG — Automatically analysis of the roll structure, in visual orientation. See the automatic analysis page for more detailed image markups.
Analyses Automatic analysis of scan
Color-channel intensity histograms (data)
Listen

Direct rendering of the scan to MIDI then rendered to MP3 with timidity (notes only with no expression and pitch is estimated).

Duplication Errors 7 frame repeat groups in image:
  • • 3 repeated frames at rows 0, 30 and 60.
  • • 2 repeated frames at rows 120 and 150.
  • • 2 repeated frames at rows 240 and 270.
  • • 2 repeated frames at rows 360 and 390.
  • • 6 repeated frames at rows 450, 480, 510, 540, 570 and 600.
  • • 2 repeated frames at rows 690 and 720.
  • • 2 repeated frames at rows 780 and 810.

Metrostyle Rolls

These are non-reproducing rolls that have tempo and dynamics curves printed onto the rolls. Click on the roll thumbnails below to view more information about each roll.
4291 — Phantoms, Op. 15, No. 3 Beach
Composer Mrs. H.H.A. Beach
Performer [none]
Tempo 70
Score As a PDF
Format metrostyle
Type original
Catalog # Metrostyle Y 4291
Comments Metrostyle
Physical Notes The roll does not contain expression holes, but does include a dotted line for a performer to realize dynamics, and a red line to control tempo.
DPI width: 301.39 pixels/inch
length: 300.25 ± 0.21 pixels/inch
Roll Length 45630 pixels, 12.66 feet
Scan Date 2017/11/22
Anchor #phantoms
Images
  • BZIP2 compressed 300-dpi uncompressed full-color TIFF — original scan, very large file in note-processing orientation (most rolls except red rolls will be left/right mirrored with time at top of file and bass notes on left side of image).
  • leader — The first 4096 pixel lines of the roll.
  • 100-dpi JPEG — Smaller resolution than above, but easier to view on the web, in visual orientation (leader of most rolls except red rolls will be at the bottom).
  • Annotated 100-dpi JPEG — Automatically analysis of the roll structure, in visual orientation. See the automatic analysis page for more detailed image markups.
Analyses Color-channel intensity histograms (data)
Automatic analysis of scan
Listen

Direct rendering of the scan to MIDI then rendered to MP3 with timidity (notes only with no expression and pitch is estimated).

Organ Rolls

Duo-Art 176-note organ rolls (two offset tracker bars). Stanford Libraries has a collection of 2000 Duo-Art organ rolls. Click on the roll thumbnails below to view more information about each roll.
3480 — Student Prince Romberg
Composer Romberg
Format organ176
Type recut
Catalog # Duo-Art 3480
Recutter Perforated by Carl Lambie, Made by Kegg Pipe Organ Builders, Uniontown, Ohio.
Comments Organ roll, 176-notes. For Aeolian Pipe Organ. List of Aeolian 176-note Duo-Art Residence Organ Rolls.
DPI width: 251.48 pixels/inch
length: 300.32 ± 0.19 pixels/inch
Roll Length 234090 pixels, 64.95 ± 0.04 feet
Scan Date 2017/11/22
Anchor #lambie
Images
  • BZIP2 compressed 300-dpi uncompressed full-color TIFF — original scan, very large file in note-processing orientation (most rolls except red rolls will be left/right mirrored with time at top of file and bass notes on left side of image).
  • leader — The first 4096 pixel lines of the roll.
  • 82-dpi JPEG — Smaller resolution than above, but easier to view on the web, in visual orientation (leader of most rolls except red rolls will be at the bottom).
  • Annotated 82-dpi JPEG — Automatically analysis of the roll structure, in visual orientation. See the automatic analysis page for more detailed image markups.
Analyses Color-channel intensity histograms (data)
Automatic analysis of scan
Listen

Direct rendering of the scan to MIDI then rendered to MP3 with timidity (notes only with no expression and pitch is estimated).

Duplication Errors 6 frame repeat groups in image:
  • • 2 repeated frames at rows 50010 and 50040.
  • • 3 repeated frames at rows 58380, 58410 and 58440.
  • • 3 repeated frames at rows 116130, 116160, and 116190.
  • • 3 repeated frames at rows 127590, 127620 and 127650.
  • • 2 repeated frames at rows 159210 and 159240.
  • • 5 repeated frames at rows 205380, 205410, 205440, 205470 and 205500.

QRS Rolls

Rolls from the QRS company. Click on the roll thumbnails below to view more information about each roll.
10-518 — The Entertainer Joplin/various
Composer Scott Joplin
Performer Pauls Oaks and Brian Williams
Tempo 75
Score As a PDF
Format qrs
Type original
Catalog # QRS 10-518
Date Aug 1974
Copyright 1974 QRS Music Rolls, Inc.
DPI width: 301.39 pixels/inch
length: 300.25 ± 0.21 pixels/inch
Roll Length 74160 pixels, 20.58 ± 0.01 feet
Scan Date 20171206
Anchor #entertainer
Images
  • BZIP2 compressed 300-dpi uncompressed full-color TIFF — original scan, very large file in note-processing orientation (most rolls except red rolls will be left/right mirrored with time at top of file and bass notes on left side of image).
  • leader — The first 4096 pixel lines of the roll.
  • 100-dpi JPEG — Smaller resolution than above, but easier to view on the web, in visual orientation (leader of most rolls except red rolls will be at the bottom).
  • Annotated 100-dpi JPEG — Automatically analysis of the roll structure, in visual orientation. See the automatic analysis page for more detailed image markups.
Analyses Automatic analysis of scan
Listen

Direct rendering of the scan to MIDI then rendered to MP3 with timidity (notes only with no expression and pitch is estimated).

Youtube Performances of the same catalog number on real player-pianos, or performances of digitial transfers of the same catalog number by various people uploaded to youtube (or even the same performer playing at a different time):

Non-reproducing Rolls

This are rolls which are not recording a live pianist. Click on the roll thumbnails below to view more information about each roll.
Chase & Baker 756-L — Novellette, Op. 21, No. 1 Schumann
Composer Schumann
Performer [none]
Tempo [70]
Score As a PDF
Format cb
Type original
Catalog # Chase & Baker 756-L
Comments Buffalo, N.Y., U.S.A. "225" From Craig's rolls.
DPI width: 301.39 pixels/inch
length: 300.25 ± 0.21 pixels/inch
Roll Length 106710 pixels, 29.61 ± 0.02 feet
Scan Date 2017/12/06
Anchor #novellette
Images
  • BZIP2 compressed 300-dpi uncompressed full-color TIFF — original scan, very large file in note-processing orientation (most rolls except red rolls will be left/right mirrored with time at top of file and bass notes on left side of image).
  • leader — The first 4096 pixel lines of the roll.
  • 100-dpi JPEG — Smaller resolution than above, but easier to view on the web, in visual orientation (leader of most rolls except red rolls will be at the bottom).
  • Annotated 100-dpi JPEG — Automatically analysis of the roll structure, in visual orientation. See the automatic analysis page for more detailed image markups.
Analyses Automatic analysis of scan
Listen

Direct rendering of the scan to MIDI then rendered to MP3 with timidity (notes only with no expression and pitch is estimated).

Pennino 58 — Porta Riali In Festa Oliva
Composer Cav. S. C. Oliva; lyrics by C. Piraino Ajello
Performer [none]
Format pennino
Type original
Catalog # Pennino 58
Original Price $1.25
Copyright Pelliccio & Vestuto Co.
Comments Popular Italian Word Roll. F. Pennino, Brooklyn, NY. From Craig's collection (not Stanford Libraries).
DPI width: 301.39 pixels/inch
length: 300.25 ± 0.21 pixels/inch
Roll Length 110730 pixels, 30.73 ± 0.02 feet
Scan Date 2017/11/22
Anchor #pennino
Images
  • BZIP2 compressed 300-dpi uncompressed full-color TIFF — original scan, very large file in note-processing orientation (most rolls except red rolls will be left/right mirrored with time at top of file and bass notes on left side of image).
  • leader — The first 4096 pixel lines of the roll.
  • 100-dpi JPEG — Smaller resolution than above, but easier to view on the web, in visual orientation (leader of most rolls except red rolls will be at the bottom).
  • Annotated 100-dpi JPEG — Automatically analysis of the roll structure, in visual orientation. See the automatic analysis page for more detailed image markups.
Analyses Color-channel intensity histograms (data)
Automatic analysis of scan
Listen

Direct rendering of the scan to MIDI then rendered to MP3 with timidity (notes only with no expression and pitch is estimated).

Duplication Errors 6 frame repeat groups in image:
  • • 3 repeated frames at rows 0, 30, and 90.
  • • 2 repeated frames at rows 120 and 150.
  • • 2 repeated frames at rows 240 and 270.
  • • 3 repeated frames at rows 330, 360 and 390.
  • • 3 repeated frames at rows 480, 510 and 540.
  • • 10 repeated frames at rows 77190 and 77220, 77250, 77280, 77310, 77340, 77370, 77400, 77430 and 77460.
US Player Rolls 5646 — Hands Across the Sea Sousa
Composer John Philip Sousa
Performer [none]
Tempo [70] 80
Score As a PDF
Format usrolls
Type original
Catalog # US Player Rolls 5646
Scan Notes Corrupted flat-field correction
DPI width: 301.39 pixels/inch
length: 300.25 ± 0.21 pixels/inch
Roll Length 70410 pixels, 19.54 ± 0.01 feet
Scan Date 20171206
Anchor #hands
Images
  • BZIP2 compressed 300-dpi uncompressed full-color TIFF — original scan, very large file in note-processing orientation (most rolls except red rolls will be left/right mirrored with time at top of file and bass notes on left side of image).
  • leader — The first 4096 pixel lines of the roll.
  • 100-dpi JPEG — Smaller resolution than above, but easier to view on the web, in visual orientation (leader of most rolls except red rolls will be at the bottom).
  • Annotated 100-dpi JPEG — Automatically analysis of the roll structure, in visual orientation. See the automatic analysis page for more detailed image markups.
Analyses Automatic analysis of scan
Listen

Direct rendering of the scan to MIDI then rendered to MP3 with timidity (notes only with no expression and pitch is estimated).

Turkey in the Straw
Performer [none]
Tempo [70] 80
Format [unknown]
Type original
Physical Notes tape repair on bass side.
DPI width: 301.39 pixels/inch
length: 300.25 ± 0.21 pixels/inch
Roll Length 47400 pixels, 13.15 feet
Scan Date 20171206
Anchor #turkey
Images
  • BZIP2 compressed 300-dpi uncompressed full-color TIFF — original scan, very large file in note-processing orientation (most rolls except red rolls will be left/right mirrored with time at top of file and bass notes on left side of image).
  • leader — The first 4096 pixel lines of the roll.
  • 100-dpi JPEG — Smaller resolution than above, but easier to view on the web, in visual orientation (leader of most rolls except red rolls will be at the bottom).
  • Annotated 100-dpi JPEG — Automatically analysis of the roll structure, in visual orientation. See the automatic analysis page for more detailed image markups.
Analyses Automatic analysis of scan
Listen

Direct rendering of the scan to MIDI then rendered to MP3 with timidity (notes only with no expression and pitch is estimated).

Calibration Roll

This section contains scans of a roll used to calibrate the horizontal and vertical DPI at the lower and upper camera setting. The lengthwise DPI was measured to be 300.24±0.21 for the lower camera setting and 300.32±0.19 in the upper camera setting. The camera position should not affect the lengthwise DPI, and it doesn't. The width DPI was measured to be 301.39 pixels/inch for the lower camera setting and 251.48 pixels/inch for the upper camera setting. The calcuations for these values are on this spreadsheet.
QRS Word Roll 9914 — My Coloring Book
Tempo 70
Format qrs
Type original
Catalog # QRS Word Roll 9914
Comments There are 13 marks along the length of the roll, numbered 0 through 12. These are one foot apart, and should be 3600 pixels apart if the DPI is 300 (the lower camera setting target DPI).
Scan Notes Scanned in the lower camera position. Bright vertical line on right side of image is due to the sun hitting the roll. Darker region near the end is when a cloud passed in front of the sun.
DPI width: 301.39 pixels/inch
length: 300.25 ± 0.21 pixels/inch
Roll Length 49410 pixels, 13.71 feet
Scan Date 2017/11/16
Anchor #lcalibration1
Images
  • BZIP2 compressed 300-dpi uncompressed full-color TIFF — original scan, very large file in note-processing orientation (most rolls except red rolls will be left/right mirrored with time at top of file and bass notes on left side of image).
  • leader — The first 4096 pixel lines of the roll.
  • 100-dpi JPEG — Smaller resolution than above, but easier to view on the web, in visual orientation (leader of most rolls except red rolls will be at the bottom).
  • Annotated 100-dpi JPEG — Automatically analysis of the roll structure, in visual orientation. See the automatic analysis page for more detailed image markups.
Analyses Automatic analysis of scan
Color-channel intensity histograms (data)
Listen

Direct rendering of the scan to MIDI then rendered to MP3 with timidity (notes only with no expression and pitch is estimated).

QRS Word Roll 9914 — My Coloring Book
Tempo 70
Format qrs
Type original
Catalog # QRS Word Roll 9914
Comments There are 13 marks along the length of the roll, numbered 0 through 12. These are one foot apart, and should be 3600 pixels apart if the DPI is 300 (the lower camera setting target DPI).
Scan Notes Scanned in the upper camera position. Scanned in the evening, so darker.
DPI width: 301.39 pixels/inch
length: 300.25 ± 0.21 pixels/inch
Roll Length 50880 pixels, 14.12 feet
Scan Date 2017/11/16
Anchor #ucalibration1
Images
  • BZIP2 compressed 300-dpi uncompressed full-color TIFF — original scan, very large file in note-processing orientation (most rolls except red rolls will be left/right mirrored with time at top of file and bass notes on left side of image).
  • leader — The first 4096 pixel lines of the roll.
  • 100-dpi JPEG — Smaller resolution than above, but easier to view on the web, in visual orientation (leader of most rolls except red rolls will be at the bottom).
  • Annotated 100-dpi JPEG — Automatically analysis of the roll structure, in visual orientation. See the automatic analysis page for more detailed image markups.
Analyses Automatic analysis of scan
Color-channel intensity histograms (data)
Listen

Direct rendering of the scan to MIDI then rendered to MP3 with timidity (notes only with no expression and pitch is estimated).