Music Problem topic

Hi! Im having a strange problem with my music. I have around 6gb of music in a 32gb sdcard but whenever I add a new song it leaps between other songs. I mean if I press to play the song A it starts from the middle then leaps to song B's beggining and again to A's song or to C's song in the same A song. It is kinda annoying and doesn't allow me to add new music (both legally downloaded or illegally)

I have formatted the sd and the phone several times but it happened to me in this and the other sd cards that I tried. Its is neither a problem of the rom (checked DN3/4, CM, Paranoid, Stock...) nor a problem of the player( N7, poweramp, stock... having the same problems)

Do you know what to do?

Thanks in advance!

PD: It is a N7100 affected by SDS chip (obviously not dead)