PSG/SCC balance

Change a few resistors in the mixdown stage of each machine
Then there are potmeters wich can be installed on the SCC outputting carts but you don't want to mess with your expensive carts.

Get the schematics of the audio mixdown stage of each machine and start soldering.

Changing the balance of audiotronics is not rocketscience and certainly not difficult to solder. It is 9 out of 10 times simply changing resistor values and listen what has changed. So lets have a look at the schematics and see what we can try.

There is a fix for SVI 728 .... it was a known issue on them.

I've done it myself, works quite well to my ears

Here: http://msx.hansotten.com/uploads/msxdocs/svi728cart.txt

Hi everyone,

I have just unpacked my SVI-728 after a pause of around 30 years (!) And I became aware of this sound issue. The Music from the SCC chip is so low that you can barely hear it. Almost all the sound comes from the PSG. I am not certain if this was the case when I played the game in my youth. Might not have occured to me then. Browsing around I found this interesting forum, but the link to the fix mentioned above does not work anymore. Can anyone give me an indication regarding what the fix was/is?

Thanks a lot Guillian. Now I only have to find someone in Sweden daring enough to open the computer and if possible also know what they are doing!