Re: Change pitch during audio queue playback
Re: Change pitch during audio queue playback
- Subject: Re: Change pitch during audio queue playback
- From: Sebastian Morsch <email@hidden>
- Date: Thu, 21 May 2009 14:22:48 +0200
Thanks Kyle and Bill for these helpful answers!
So obviously I can't do my pitch control (on desktop by the way) with
audio queues and will have to make the step into audio units. Judging
from what I have been reading so far, this is where it gets difficult
for beginners due to the lack of documentation...
My first little research yielded some resources I'd like to share here
for everyone who might stumble upon this thread:
http://www.subfurther.com/blog/?p=507
This blog entry was extremely helpful for understanding some CA
basics, especially the difference between the two concepts "audio
queues" and "audio units". It's also a great starting point because it
links to more fundamental material.
Also worth mentioning for starting with AU seems to be this one:
https://devforums.apple.com/thread/1140?start=0&tstart=0
(I think you have to be an iPhone developer to access it)
Final question: since CA documentation is so sparse, wouldn't it be a
good idea to create a common place where the blog/forum/mailing list
knowledge is bundled? I'm thinking something simple like del.icio.us
or a thread "Core Audio for beginners" in this list. Or are there
legal (or other) issues with that? I couldn't find anything of that
kind yet. And I'm new to this list so I don't really dare to do it
myself here :-).
Thanks again!
Sebastian
Am 20.05.2009 um 21:57 schrieb William Stewart:
Yes, but you can't access this directly through audio queue - if you
look at the PlayFile example, you can use that as a starting point,
then insert a varispeed between it and the output unit (or create a
mixer for multiple files) (I'm presuming this is for desktop, but
you don't say)
Bill
On May 20, 2009, at 11:13 AM, Kyle Sluder wrote:
On Wed, May 20, 2009 at 8:49 AM, Sebastian Morsch
<email@hidden> wrote:
But now i have to leave the secure area of the tutorial as I try
to create a
"pitch slider", that changes the pitch (just the sample rate, no
pitch-shifting!) during playback of my audio files. Pretty much
like on a
DJ's turntable, only with a wider range.
Isn't this exactly what the AUVarispeed Audio Unit is intended for?
--Kyle Sluder
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