Re: AUGraph Problem
Re: AUGraph Problem
- Subject: Re: AUGraph Problem
- From: Jens Alfke <email@hidden>
- Date: Sat, 12 Apr 2008 18:52:19 -0700
On 12 Apr '08, at 4:27 PM, Christopher O'Neill wrote:
I wrote a program a few months ago using callbacks and AudioFileIDs
which, in a nutshell, opened 4 different files, changed their
pitches independently, mixed them together, and finally played them
through the default audio source.
Did your initial code use a true pitch-shifting algorithm, or just
alter the sample rate to change the pitch? There's a huge difference
in CPU overhead between the two approaches. The AUPitch unit uses the
expensive algorithm, I think (which keeps the speed the same). That
might explain why you're not able to run as many of these in parallel.
—Jens
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