Re: AUConverter crackling
Re: AUConverter crackling
- Subject: Re: AUConverter crackling
- From: William Stewart <email@hidden>
- Date: Tue, 13 Jan 2004 11:39:27 -0800
Its a part of the QuickTime 6.4 release (or later) for Jaguar (as well
as Panther of course)
Bill
On 13/01/2004, at 12:46 AM, Hugues Pisapia wrote:
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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