PROBLEM WITH FAMICOM SOUND AV MOD

[mezgho]

Hi! I recently modded my famicom and everything is super fine excepto for the sound. I don´t know how to explain this...i´m only getting 2 sounds, one is the back armony midi and the "drums" midi...I notice that when I was playing Mario bros 3  In the map, the music was weird...I realised the principal armony was missing...and that´s it...I upload a pic of the famicom so you can see where the problem is...maybe I do something wrong with the sound.

Thanks in advance 

(sorry for my bad english)

[Pikkon]

Where are you getting audio on the board,don't see it coming from pin 46 of the cartridge connector.

[NintendoKing]

These are the contact points needed.