Try:
http://audacity.sourceforge.net/
It's a free music editor which you can edit on your PC. I haven'theard of one where you can edit on your mobile.
Yu tink se me dun but me na dun!
"One of the heads of the beast seemed to have been fatally wounded, but the wound had healed. The whole earth was amazed and followed the beast".
Good News Bible. Rev. Ch.13 V.3