[linux-audio-user] 44.1, 48 or 96?

Greg Wilder greg at gregwilder.com
Mon Sep 12 10:03:03 EDT 2005


On Mon, 2005-09-12 at 09:00 -0400, Paul Davis wrote:
> in my understanding, dithering has nothing to do with downsampling.

Yup - my bad.  I was confusing terms.  Thanks for the correction.

> sample rate changes can be handled by a
> variety of interpolation techniques, which exist in a plane defined by
> two axes: quality and CPU cycles per sample. you can do cheap linear
> interpolation and get a pretty unpleasant effect, or use more cycles for
> a better result. 

Thanks for stepping in and clearing this up.  Interpolation is the word
I was originally looking for.  Too many uncaffeinated brain cells too
early in the morn'

> dithering comes in its own varieties, but they are not
> arranged on a simple 2D axis the way that interpolation is. AFAIK, so-
> called "pow-f" dithering is spoken of the most highly at present, but
> relies on a proprietary (patented, too, i think) algorithm.
 
Very interesting stuff.  Thanks for the help.

Greg





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