Take Songer to the next levl

One ting that would take Songer to the next level would be to be able to make covers of a song - that you get that magical tune/vocal sound but a word is not right or you change you mind on a lyric. To be able to re-use the tune would be a great addition - even if this feature cost say 5 credits. To be able to get it right would be awesome instead of creating an additional 50+ variations