There is no such thing as "MAGNETIC TRANSCRANIAL THERAPY". It is a bunch of hooha that people in the past have tried to promote , but has long been dismissed by neurologists as bunk.
Now music therapy is a different thing. Music has the ability to strongly affect our mood, however magnetism is just a lot of nonsense. It has "effects" but nothing that would be considered "Therapy" in any way shape or form. Don't get ripped off by people selling "magnetic devices" that are proclaimed to be of "therapeutic value", itt's all snake oil