refactoring of transposition code so that it is applied before intervals are calculated
refactoring of transposition code so that it is applied before intervals are calculated

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