music recovery

Is it on a memory card?

If so, remove it and do nothing else until you have fixed the issue.

Then look for software that can recover deleted files.

This is just one of many options:

http://www.easeus.com/android-data-recovery-software/

 

I don't know what you mean by "boosting" the phone - sounds like "boot", but that wouldn't recovery anything.

The important question is where was the music? If it was on a removable card then take the card out of the phone, put it in a card reader and run some file recovery software on a computer (if you are using Windows Recuva is widely recommended and free). (Edit: as said above)

If it was on the internal storage (which includes the "emulated sd card") then there's probably nothing you can do - file recovery software won't work over an MTP connection.