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Re: got MatrixMixerTest working
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Re: got MatrixMixerTest working


  • Subject: Re: got MatrixMixerTest working
  • From: James McCartney <email@hidden>
  • Date: Thu, 30 Oct 2003 13:59:30 -0800

On Oct 30, 2003, at 11:50 AM, Robert Grant wrote:

Well I got some noise out of the MatrixMixerTest after finding that files are rejected when they don't pass this test (which is probably most AIFF or WAV files on your machine):

if (d.bufs[i].asbd.mBitsPerChannel != 32
|| !(d.bufs[i].asbd.mFormatFlags & kAudioFormatFlagIsFloat))
{
continue;
}

Exporting with the 32 bit float codec in QuickTime Pro got a usable file and the program worked as expected.

Apple: some kind of a squawk when a file is rejected would have been nice ;-)


Yes, in order to get it to work you need to have some 32 bit float stereo files which it loads in RAM.
This was my test program, which did not really get a proper once-over before it became sample code.
Sorry I missed the previous questions. I've not been paying close attention to the list..

-
james mccartney
apple coreaudio
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References: 
 >got MatrixMixerTest working (From: Robert Grant <email@hidden>)

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