scalar (tonal) invert -- most of what we need for #879
scalar (tonal) invert -- most of what we need for #879

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