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Silent m4a AAC recordings

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Silent m4a AAC recordings

Subject: Silent m4a AAC recordings
From: Dominic Feira <email@hidden>
Date: Fri, 28 Oct 2005 16:52:23 -0400

Hello.

I am currently trying to figure out how to record to an m4a file. I am using 100% AudioFile routines, not the CAAudioFile or ExtAudioFile.

So far I've managed to record only silence. Interestingly, the recording is the correct length. The AudioConverter appears to be working correctly. If I dump the output of the converter I can watch the data. It drops to zero properly if I silence the input source. So, that leads me to believe the problem is on the AudioFile side of things.

If I switch the file format to AIFC and set the audioconverter's output format to something appropriate a valid (non-silent) recording is produced.

I have found references to this problem while searching through the archives, but no solution. Has anybody ever figured this out?

Dominic Feira/ Code Monkey / Ambrosia Software, Inc.
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