C64 sound problems

[David Betz]

>> I have a cable with a DIN connector on one end and four RCA plugs  
>> on  the other. I've used a multimeter to determine which RCA  
>> connector is connected to which pin on the DIN and have used the  
>> RCA connector that connects to DIN pin 3 for audio output and the  
>> one that connects to  DIN pin 4 for composite video output. Is that  
>> correct?
>
> I can't recall, but I believe the audio RCA plug is either white or  
> red, if memory serves, if you're using a Commodore cable.

I'm not sure if this is a Commodore cable but the plug that connects  
to DIN pin 3 (audio) is black and the one that connects to DIN pin 4  
(composite video) is white. The other two are red connecting to DIN  
pin 1 (luminance) and yellow connecting to DIN pin 5 (audio in). All  
of the grounds connect to DIN pin 2.