Megaflashrom: I can't hear the audio

Just to be sure: Do you mean "resistor" in stead of "transistor" right? And I can just got line 49 and put two of them in between? And do you mean 2 or 3 Ohm, or 2,3KOhm? My electronica knowledge is buried way to deep

Ah, ok, een weerstand dus. En 1 voor slot 1 en 1 voor slot 2. Heb je misschien een wat duidelijkere foto? Dan is de waarde van de weerstand ook gelijk te controleren.

Ah, ok, A resistor. And 1 for slot 1 and 1 for slot 2. Do you happen to have a more clearer picture? Then we can check the resistor's value as well.

i also have the same problem before, but i fix it like using 2 transistors (value 2,3 Ohm) from the pin 49 leg of the cart to the pcb, with good results!!

see link : http://www.mijnalbum.nl/Foto-NPHJDBPA.jpg : notice the red circle !!!._,

i remove this picture with a better one

link : http://www.mijnalbum.nl/GroteFoto-UPH3IEDZ.jpg

With that resistor you can change the extern sound to lower soundlevel.
But the problem is with the Flash SCC+ cart, that the PSG is almost to a zero sound level.
Only with that cart, with a normal SCC cart everthing is perfect.

It looks like a the Flash cart uses the same adresses as the internal PSG.
Then you have a problem

could be, but that's why i chose for a 3rd slot into my nms8255 instead of a slot expander