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Re: Sampling rate question
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Re: Sampling rate question


  • Subject: Re: Sampling rate question
  • From: Brian Willoughby <email@hidden>
  • Date: Tue, 19 Apr 2005 04:21:11 -0700

David Tay <email@hidden> asks:
[  Would it be correct to say that
[  a.  when the requested sample rate in a core-audio based application
[  does not match the actual sample rate of device set by the control
[  panel/ application,
[  Or
[  b. when multiple recording applications are running with different
[  sample rates/ depths
[
[  upsampling /down sampling would be performed by CoreAudio without
[  affecting the actual hardware settings?

Yes, that is correct.  But only so long as your code is using the Default
Audio Output Unit or otherwise accesses the AUHAL.  Most current programs do
this, but before the AUHAL was available, applications spoke directly with the
HAL, and did not get automatic SRC.  SRC is still available to applications
which communicate directly with the HAL, but they must attach their own
AudioConverter.

Brian Willoughby
Sound Consulting
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References: 
 >Sampling rate question (From: david tay <email@hidden>)

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