SharpEye Example: Mozart Piano Sonata No. 13 in B-flat major, K 333

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Musical Example: last page of the first movement of Mozart's Piano Sonata No. 13 in B-flat major, K 333 from W.A. Mozart Sonates, Vol. 1 edited by C. Saint-Saëns. Paris: A. Durand & Fils; 1915. Click on the page thumbnail on the left to download the original TIFF scan used as input for OMR processing (right click to save to a local file). The scan was done in black and white at 300 dots per inch. Paper was off-white due to age. This example illustrates the functionality of SharpEye for converting moderately simple piano music. Time to manually correct errors in automatic recognition was 4 minutes and 50 seconds without proof listening. The music is also printed slightly smaller than normal, which causes more errors in the recognition due to lower printing quality. The small thumbnail below is for a 600 DPI resolution grayscale version of the page. Right click on the image to save it to your disk (18 MB size):

First system of music on the page:

bar 1

Missing first half-note chord in l.h. probably due to break in noteheads.

bar 2

Extra staccato due to broken tip of fingering mark "3". Missing first half-note chord as in bar 1. Added half-note rest derived from slur.

bar 3

Missing staccatissimo mark on 4th eight note beat of r.h.

bar 4

Missing staccatissimo mark on 4th and 8th eight notes of r.h. Missing first half-note chord in l.h.

bar 5

Missing staccatissimo mark on 4th eight note beat of r.h.

Second system of music on the page:

bar 6

Extra staccato mark derived from fingering.

bar 7

Extra staccato mark derived from fingering. "cresc." marks are ignored in SharpEye. Missed natural sign on beat 3.5 in r.h.

bar 8

No mistakes.

bar 9

Missed trill marks on beats 1, 2, & 3 of r.h.

bar 10

SharpEye does not allow slurs between durational note and grace notes, so it cannot correctly interpret the last slur in the measure.

Third system of music on the page:

bar 11

Extra staccato on last note in l.h. probably due to speck on page.

bar 12

Missing "cresc." mark because SharpEye ignores them. Missing staccatissimo marks on last three notes of l.h.

bar 13

Flat in beat 2 of r.h. interpreted as a half-note on C5. Missing second beam on beat 2, so notes are interpreted as eighth-notes instead of sixteenth-notes.

Fourth system of music on the page:

bar 14

Missed staccatissimo marks on beats 2.5, and 4.5 in r.h. Missed 8th note flag on beat 2.5 in r.h.

bar 15

Confused by first slur in r.h. because it extends beyond last note in slur.

bar 16

Confused by beams in beat 1.5; interpreted 16th notes as 8th notes. SharpEye ignores "cresc." marks. Missed staccatissmo marks in beat 4 of l.h. Missed half-note rest on beat 3 of l.h.

Fifth system of music on the page:

bar 17

Missed beam on beat 4 of r.h.

bar 18

Missed beams on beat 4 of r.h. and added two notes derived from beam. Missed beams on beat 2 of l.h. and added two notes derived from beam.

bar 19

SharpEye ignores trill extension lines. Missed slur between grace notes at end of measure.

Sixth system of music on the page:

bar 20

Missed 8th-note flag on beat 2.5 in r.h. Added staccato on beat 2.5 derived from fingering. Added half-note rest in l.h. derived from slur

bar 21

Missed flat on beat 2 in l.h.

bar 22

Missed staccatissimo marks on beat 1 in r.h. Slur starts one note too late in r.h.

bar 23

Missing trill mark on beat 1.5 in r.h.; missing decrescendo hairpin probably due to it being very short.

bar 24

Added extra note to first chord in r.h.