Merge pull request #986 from diizy/stable-1.1

Sanitize master output
Merge pull request #988 from diizy/stable-1.1

Add safeguard for beat pattern wheelevent
Merge pull request #990 from diizy/stable-1.1

InstrumentSoundShaping: ensure that release time is never longer than th...
Merge pull request #991 from diizy/stable-1.1

Mixer: optimize peak value measuring functions