I see. I gather that you pre-record your backing onto existing MP3's, which wouldn't leave much to do live. Or do you sing melody over the sequence ?

I do a lot of singing, and I too believe in any tools that enhance the final product. I use midi, but I didn't think MP3's could be manipulated enough to use. If so, it being audio, it has advantages like vocal backing.

Just trying to get into the 21st century.