Re: best way to get rate conversion
Re: best way to get rate conversion
- Subject: Re: best way to get rate conversion
- From: "Phil Burk" <email@hidden>
- Date: Thu, 10 Oct 2002 18:21:42 -0700
Thanks for the info.
I've been playing with the examples "UsingAudioConverter.cpp" and
"UsingDefaultNoAC.cpp". This has raised some questions.
1) I found the headers on disk, and the "Audio and MIDI on Mac OS X (pdf)"
doc at
http://developer.apple.com/audio/macosxaudio.html.
But I can't find any detailed references to the functions like
AudioConverterFillBuffer(). Can you give me a link to the online reference
docs?
2) I tried to download the latest CoreAudio SDK (9/7/2002) but it won't
install. Does it need Jaguar?
3) The PDF doc says "kAudioUnitID_DefaultOutput. This is a specialized HAL
output unit that provides additional services, such as sample rate
conversion,". Does this mean that if I want to use arbitrary devices, not
the "default" device that I need to use kAudioUnitID_HALOutput and it does
not support rate conversion. So I need to use an AudioConverter?
4) Can I use an AudioConverter with the HAL and not have to use an
AudioOutputUnit? I've already got the HAL working except for SR conversion.
5) What is the difference between AudioConverterFillBuffer() and
AudioConverterConvertBuffer()? Is the latter for pushing data which I would
need if I am converting audio input?
Thanks. Once I get tuned into the detailed SDK docs I won't ask so many
questions...
Phil Burk
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