Newsgroups: comp.sys.cbm
Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!uupsi!rodan.acs.syr.edu!rjkopp
From: rjkopp@rodan.acs.syr.edu (Ray Kopp)
Subject: Pin-out on C-64 Audio Port
Message-ID: <1991May1.143104.24424@rodan.acs.syr.edu>
Sender: rjkopp@rodan.acs.syr.edu (Ray Kopp)
Organization: Syracuse University, Syracuse, NY
Distribution: usa
Date: Wed, 1 May 91 14:31:04 GMT

Someone a while back asked about pin out on the Audio Port for a C-64.  Several
people told him about it going through his user port, check his Chip (among a 
few).  I was kind of surprised some people didn't ask him which method he meant.
There is the standard through the TV like one person mentioned but the other
is a 5-pin din on the back of the PC next to the Serial I/O port.
  
I bought a music program from Scarborough that came with a cable.  I plugged
it in and it didn't work.  Being a technician I checked the pin out of the 
cable and against the pin diagram.  I think possibly Scarborough's description
of the pin-out and Commodore's didn't match.  One is reversed.  Of course it kind
of depends on orientation also.  I flipped the orientation from left to right and
it worked.   
  
The following is the pin out from the Commodore programmers reference manual:
 
     3        1
      5      4
          2

Ray Kopp
rjkopp@suvm.acs.syr.edu