[sdiy] Replacing DACs

[Harry Bissell Jr]

If it is delta modulated, you could drop every other
bit. Run the (1 bit) data through a D-flip flop
and clock from the system clock divided by 2 (or 3 or
4)

H^) harry


--- "Cornutt, David K" <david.k.cornutt at boeing.com>
wrote:
> 
> From: john mahoney [mailto:jmahoney at gate.net]
> To make a 12-bit DAC act 
> > like an 8-bitter,
> > just ground the 4 low bits (or switch them out of
> the circuit).
> 
> I don't know that this would be worth pursuing on
> '80s-vintage gear.  A lot of that stuff used delta
> modulation to save memory, meaning that the actual
> resolution that gets recorded in memory is only 8,
> 6, or even 4 bits.  If you start zeroing-out or
> one'ing-out bits, I think the result is likey to
> turn into undifferentiated noise, or worse, nasty
> pops and squeals, very quickly.  If you decide to
> experiment with it, don't wear headphones and keep
> the volume down until you know what the result is.
> 
>