[sdiy] AES/EBU

[Magnus Danielson]

From: "Jay Schwichtenberg" <jays at aracnet.com>
Subject: RE: [sdiy] AES/EBU
Date: Mon, 21 Jul 2003 09:11:38 -0700

> Exactly!
> 
> I use to do sound cards and after using a multi-bit converter I'll never go
> back to a single bit.

I think that my initial dislike of 1-bit systems where to some degree 
deminished when I learned what happend to the noise. However, I later also
learned about the jitter problems, and especially how different setups will
reducing timing-problems got me more convinved that pure 1-bit sigma-delta
converters may be a bit too hard to do in real life. I think that better
result is probably acheived by multi-bit ADC or DAC in combination of some
sigma-delta oversampling/noise shaping.

One problem to get around the timing problems is to use these lovely chips 
which actually frequency convert from the incomming stream to a local (stable)
clock. It actually sounds a bit insane but maybe it is a practical way of
solving it for the playback (DAC) case. I think it is a bad solution which 
should be avoided since it does contribute to the reduction of quality.
However, these frequency converter chips can do chocking quality these days.
Frequency-conversion is a messy buissness to say the least.

Cheers,
Magnus