clean up icons
reorganize synthesizer; add zita1 reverb
update synthesizer implementation
fix regression tests
some regression fixes
move driverFactory() into separate file
fixes for synthesizer
reorder synthesizer; enable zita1 by default; more cleanups
some fixes for windows and audio playback
fix regression: switch patch for fluid in mixer
fix small gui bugs for synthesizer
fix regression: export audio
fix MidiPatch handling
load sfz in a separated thread, progress is missing
initialize Channel() with default synthesizer Fluid
implement mixer volume and pan for zerberus
free memory after deleting sfz font
add progress in sfz loading
make audio driver selection exclusive
fix #20677: playing position is not displayed in fret diagram