"Fed Up Lurker" wrote in message
...

"David Looser" wrote in message
...
"Fed Up Lurker" wrote

You Dave won't get the gist of this one

(I did add a "yet" which you snipped)

On the contrary I get the "gist" of it only too well!

Do you? I doubt it, if so then briefly explain the "gist" of
"piggy-backed"
TDA1543 dac chips. And specifically that chip, what is the "gist" of
piggy-backing (or daisy chaining) that specific tda1543 chip in NONOS
mode?
If you do get the "gist" you'll be able to explain it in one sentence.



Hi Dave
Just before I go off line for a couple of days, well I'm feeling beneficial
and gentle toward you and I don't want you spending hours googling
trying to find counter arguments that are wrong, so I'll explain it
(briefly):
The TDA1543 (Being what PMi originally identified as a hybrid thingy)
when piggy-backed/daisy chained the 1543 actually acts as a type of filter.

With NOS'ing I disable/by-pass the *pre-conversion* digital filter.
The analog output sector remains as is, and that is for system
compatibility.
Thats NONOS.

The "gist":
But with the piggy-backed *TDA1543*, the quantization unltrasonic hash
is pushed out of the audioband with each step of the daisy chain, so
it is a form of oversampling not pre-conversion nor in post analog output,
but a stepped version *DURING* conversion.
So though in effect there is no filter pre-conversion, and technically that
can be called NONOS, with eight TDA1543's piggy-backed (four per
stereo channel) that is in effect 4 x o/s but *During* conversion.
And as for a NOS'er such as myself, thats not NONOS, regardless
of marketing laws that allow them to call it that.
Now Dave try and get some rest and look out for Jim's articles on the
subject on his site and in HFN+RR sometime near xmas.

I don't know why, but for some strange reason I feel compelled to
mention that "trendy" DAC to end this post, but I'll resist the urge.....

Toodle pip.