midi playback issue (chorus/reverb) still happens in Musescore 2.0 beta
Sometimes the midi playback breaks. After a couple of measures it sounds like its under water and it starts to slow down and becomes unusable. Once this issue starts it continues even after you stop and start the program -- I think the problem is in a driver somewhere. This is a known bug. The fix is to bring up the Musescore mixer and simply adjust the reverb/chorus. This completely fixes everything.
I have several programs for midi playback, all configured the exact same way. Musescore is the only one where this problem happens.
I'm guessing that the program needs to send a midi chorus/reverb message at the start of every playback regardless of whether the mixer has them set to 0 or not.