On 03/07/13 07:57, Guy Stalnaker wrote:
Attached is a 12-measure LP file snippet with four treble-clef parts plus piano reduction. The piano reduction works perfectly until it encounters a temporary polyphonic passage (TPP). There are two in the example, at mm.3-4 in the upper two voices and mm. 8-9 in the lower two voices. As you can see on compiling it (2.16.2) the first two measures are set in the piano reduction as expected, stems and rests in the right places and directions; LP reports no errors. Starting in m.5 however, LP reports collisions for rests/notes in the upper voices and, as you can see, the stems no longer, as they were in the first two measures, go the 'right' way, up for the upper part and down for the lower part. The two lower voices continue to be set correctly until they, too, have a TPP in mm.8-9, after which they also are no longer set correctly and LP again reports collisions.
I built your example with 2.17.21. No warnings at all in the log, and the only problem I can see anywhere in the output is in the piano reduction mm 3 & 4, where the tie between the two whole notes in the upper voice goes through the head of the half note in the lower voice, and that can be fixed by using ^~ rather than _~.
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