Re: AUConverter crackling
Re: AUConverter crackling
- Subject: Re: AUConverter crackling
- From: Chris Rogers <email@hidden>
- Date: Tue, 13 Jan 2004 10:57:50 -0800
Hugues, sorry the varispeed AU first appeared in Panther...
Chris Rogers
Core Audio
Apple Computer
OK thanks, That's clear now. Is that varispeed AU available in
jaguar or previous versions of OS X?
Hugues
William Stewart wrote:
Yes indeed that does sound like the same problem. The AC's
resampler is NOT about dynamic adjustment (that's why to get a
different sample rate you have to make a new audio converter) and
also why we have the varispeed AU.
Bill
On 12/01/2004, at 7:21 AM, Hugues Pisapia wrote:
Well,
I went back into this thread and it seems to be also a problemk I
am experiencing... I'm using the HAL through Java to access the
recording (and playback) facilities. I want to perform resampling
on the fly and get crackling sound, apparently, between each
chunk of audio that go throught the AC.
Is that the same problem, and do I have to use the AudioUnits as
well? If so... What is the AC for?
Hugues
Stefan Werner wrote:
Hi,
To: email@hidden
From: Chris Rogers <email@hidden>
Subject: Re: AUConverter crackling
The AudioConverter is not designed to change sample-rate on the fly like
this. The AUVarispeed AudioUnit should be perfectly adapted to this
application by tweaking the "rate" parameter on the fly.
OK, I'll try that. Is it using FFT or is it doing simple
resampling? I need the latter, that's why I tried the
AUConverter. To me, AUVarispeed sounded more like timestretching
than resampling.
I suppose there's no other documentation than the WWDC
presentation Bill mentioned?
Stefan
http://www.hdm-stuttgart.de/~sw19/audiospace/
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