add crescendo support to individual synthesizer volume
add crescendo support to individual synthesizer volume

eohomegrownapps/musicblocks,walterbender/musicblocks,walterbender/musicblocks,eohomegrownapps/musicblocks,Hrishi1999/musicblocks,walterbender/musicblocks,eohomegrownapps/musicblocks,Hrishi1999/musicblocks,Hrishi1999/musicblocks