Re: Audio File to PCM Float32 Format Converter?
Re: Audio File to PCM Float32 Format Converter?
- Subject: Re: Audio File to PCM Float32 Format Converter?
- From: George Malayil-Philip <email@hidden>
- Date: Sun, 08 Jan 2006 23:08:38 -0500
- Thread-topic: Audio File to PCM Float32 Format Converter?
Title: Re: Audio File to PCM Float32 Format Converter?
Hi,
CAAudioFile (Developer/Examples/CoreAudio/PublicUtility/audioFile-New) should have the routines you need to read an audio file and convert it automatically to PCMFloat32.
George M.P.
I'm needing an Audio Unit that reads from an audio file and renders PCM Float32 data.
Before I write this myself, I want to find out if its already available to me.
It seems it may be, as alluded in the Audio Unit API Documentation (Developer/Examples/CoreAudio/Documentation/AudioUnits/Topics/au_type.html):
"Format Converter Units
Typically, Audio Units deal with PCM data in Float32. However, several format conversions may
be desirable within a processing chain, such as the source of a chain that supplies data from a file, sample rate conversion..."
Is a format converter unit provided that does this?
As a second question, is the subtype functionality for the Apple format converter units documented anywhere?
kAudioUnitSubType_AUConverter = 'conv',
kAudioUnitSubType_Varispeed = 'vari',
kAudioUnitSubType_DeferredRenderer = 'defr',
kAudioUnitSubType_TimePitch = 'tmpt',
kAudioUnitSubType_Splitter = 'splt',
kAudioUnitSubType_Merger = 'merg',
Many Thanks,
-Scott
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