Re: AudioConvertor does dither?
Re: AudioConvertor does dither?
- Subject: Re: AudioConvertor does dither?
- From: Ev <email@hidden>
- Date: Mon, 3 May 2004 07:55:31 -0500
On May 3, 2004, at 12:00 AM, email@hidden
wrote:
Ev,
Currently the AudioConverter does no dithering or noise-shaping and
simply rounds to the nearest integer.
Chris Rogers
Core Audio
Apple Computer
When I use the AudioConvertor to blast my buffers from floating
point data to whatever stock bit depth I need, is there any sort of
dithering action done during the conversion?
If so, what kind of dithering is it? Is it noise-shaped at all?
Triangular?
OK, knowing that then, is there any need for dithering code anywhere in
this process then? Can/should I modify the results?
I've seen bits of sample code dealing with dither that is all about the
translation from floating point to integer, just adding a particular
noise at the resulting bit depth's lowest level, so the rounding isn't
so expected. I've heard examples of it, and I see the point.
Should I be doing this to my floating point numbers before I feed them
to the AudioConvertor? Or is the floating point number, by nature,
dithering in itself and it's just not necessary?
Does anyone have any suggestion?
Ev
Technical Knowledge Officer
Head Programmer/Designer
Audiofile Engineering
http://www.audiofile-engineering.com/
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