On Tue, 13 Jul 1999 19:58:13 -0500 (CDT), Frederick Bruckman <fb@enteract.com> wrote:
> 
> Do you have any information on the Singer codec in the AV macs? All
> I've been able to find so far is the code name of the chip.

I do.  Singer is Apple's code name, but it's actually a codec chip
developed and sold by another company (I think the company was called
ITT or something).  I downloaded the PDF datasheet off the Net a while
ago, and I hope it's still buried somewhere in one of my HFS
partitions.  I'll try to get and post the URL when I get home or I
could directly send the PDF to you if you want (provided that I didn't
lose it when my 2G drive died on me).

I think we need to figure out how DMA works for audio I/O, also.  I
tried to disassemble the ROM code but I quickly got lost every time I
tried.

Ken