Issue is caused by rounding errors: Sibelius generates a file where divisions is 256, eighth note in triplet has a duration of either 85 or 86. Converting to MuseScore internal units (480 tick / quarter note) leads to triplets eighths taking 159 or 161 ticks. This confuses the MusicXML importer, causing notes actually starting at the same time to end up shifted in MuseScore.
Comments
Issue is caused by rounding errors: Sibelius generates a file where divisions is 256, eighth note in triplet has a duration of either 85 or 86. Converting to MuseScore internal units (480 tick / quarter note) leads to triplets eighths taking 159 or 161 ticks. This confuses the MusicXML importer, causing notes actually starting at the same time to end up shifted in MuseScore.
Fix in https://github.com/musescore/MuseScore/pull/39.
Fixed in 572e78b.
Automatically closed -- issue fixed for 2 weeks with no activity.