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rendering output to a file

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rendering output to a file

Subject: rendering output to a file
From: Ashley Allen <email@hidden>
Date: Wed, 21 May 2008 16:45:24 -0700

Hi,

I have an AUGraph of AUAudioFilePlayer units connected to an AUStereoMixer connected to the default output device. I have added a render callback to the output device that uses the ExtAudioFile API to write rendered audio to disk. The list below shows the supported writable file types and the supported encoding formats on my system.

I keep getting an error ExtAudioFileCreateNew FAILED! 'fmt?'. I think its complaining about the encoding format. I want to create an *.aiff file. What do I specify for an encoding format ID given the list below? Is there a matrix of file types and encodings?

Thanks,
Ashley

Supported Writable FileTypes
AIFC
AIFF
MPEG Layer 3
NeXT/Sun
Sound Designer II
WAVE
AC3
AAC ADTS
Apple CAF File
MPEG4 Audio
MPEG4 Audio

Supported EncodeFormatIDs:
MACE 3:1
MACE 6:1
QDesign Music 2
Qualcomm PureVoice\u2122
AAC
Apple Lossless
A-Law 2:1
IMA 4:1
Linear PCM
AMR Narrowband
\u03bc-Law 2:1

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