Successfully complete arcade mode the indicated number of times to unlock the corresponding bonus song.

ErAseRmoToR maXimUM: Seven times
Gobble: Three times
Infinite Prayer -floating flock style: Five times
Sana Mollete Ne Ente -B.L.T. style: Two times
The Big Voyager -Infinite Prayer Reinterpretation: Six times.
The Shining Polaris: One time.
Trancemission: Ftimes