Instruments play as piano with odd side effects
“Test part play.mscz” was originally created in V2 and used my own instruments file and soundfont. This is a cut down version.
There are 4 instruments, three of which correspond to standard GM bank 0, Flute, Clarinet and Alto sax. The fifth is a Euphonium which has patch 58 (Tuba in GM) in bank 64.
For the tests, I used the MuseScore-General.sf3 soundfont.
With version 3.0.1, all the parts play correctly, the euphonium part being played as a tuba. In the mixer, the patch is shown as Grand Piano, which it clearly is not.
With nightly 2019-02-18-0821, all the parts play as a piano, even though the “patch” field in the mixer says otherwise, and, when you drop down the patch list, all sorts of arbitrary patches are selected (at one point, all sorts of arbitrary instruments were played, but I cannot reproduce this). Resetting the patches in the mixer fixes it. Changing the instruments in the staff properties fixes it, but may have bizarre side effects.
I reported this first in #109941: Regression—playback in single part instead plays full score as I was testing the change to the mixer. cadiz1 reported that changing the Euphonium to a standard bass caused Musescore to crash on my original submission
I could not reproduce this crash but I retyped the score (“Test part play RETYPED.mscz”) in nightly 2019-02-18-0821 with standard instruments. The wrong instrument effect is the same.
Although I could not get Musescore to crash when changing the Euphonium, I found a stranger effect when I had both the cut-down and retyped scores open.
Starting with an empty nightly 2019-02-18-0821 and MuseScore-General.sf3 soundfont:
Load “Test part play.mscz” and “Test part play RETYPED.mscz”
Both play as piano.
Change the Euphonium in “Test part play” to Strings bowed / Contrabass.
The bass lines in BOTH scores now play as a bowed double bass. Changing Euphonium in one score changes the Tuba in the other!
Version test for wrong instrument effect.
Furthermore, both cut down scores suffer from the odd playback problem #283698: Playback from note in score jumps / pauses / hangs from the start of the score, in this case hanging for 10-15 seconds the first time the score is played (whether OK or NOK in above list).