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Re: kAudioDevicePropertyStreamFormatMatch rate is zero in Panther
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Re: kAudioDevicePropertyStreamFormatMatch rate is zero in Panther

Can you provide a more concrete example of the failure? I just coded up a few experiments with kAudioDevicePropertyStreamFormatMatch and I didn't see it return anything by a valid sample rate in the returned ASBD when I was using an iMic.

On Nov 19, 2003, at 2:39 PM, Phil Burk wrote:

Does anyone know the status of the bug demonstrated in this letter from July
18?

http://lists.apple.com/archives/coreaudio-api/2003/Jul/18/ halpatherformatmatchingb.001.txt

I cannot find any further discussion of it.

It appears that Panther returns a ZERO sample rate for

AudioDeviceGetProperty ( ..., kAudioDevicePropertyStreamFormatMatch, ...)

while earlier versions returned a reasonable match.
This may only affect USB devices such as the iMic.

I believe that this new bug is the cause of some failures of PortAudio code
under Panther. Several applications are using PortAudio, including Audacity,
JSyn, PD, etc. so I would like to know how to fix this.

Thanks,
Phil Burk
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--

Jeff Moore
Core Audio
Apple
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References: 
 >Looking for PlayEffect example code (From: Robert Grant <email@hidden>)
 >kAudioDevicePropertyStreamFormatMatch rate is zero in Panther (From: "Phil Burk" <email@hidden>)



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