Yesterday a strange situation has succeeded to me with my SD1: during the play back of SMF there was some strange sounds, like hisses or strange guitar sounds.
This situation happen two times so after two power off and on the keyboard resumed to work correctly.
What have can happened : humidity, tension electrical worker or problems to the "audio" card?
Exist the possibility to check if the keyboard is OK?
It is 10 months that i use SD1 and this situation never happen.

Thanks in advance.

Bye