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Re: kAudioUnitType_FormatConverter subtypes

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Re: kAudioUnitType_FormatConverter subtypes

Subject: Re: kAudioUnitType_FormatConverter subtypes
From: Doug Wyatt <email@hidden>
Date: Fri, 9 Dec 2005 17:47:21 -0800

On Dec 8, 2005, at 0:50, Rustam Muginov wrote:

Hello all. What is the differences between kAudioUnitSubType_Varispeed and kAudioUnitSubType_AUConverter?

You can think of the varispeed as a sample rate converter where you can changing the conversion ratio dynamically.

It's useful for things like: - synchronizing audio between two devices which are not hardware synced (set the varispeed's rate to the ratio of the two devices' HAL rate scalars) - simulating tape scrubbing (dynamically changing the playback speed / pitch)

Does the first perform only samplerate conversion and the second every type of conversion?


yes.

If yes are where any reasons to use Varispeed instead of full-scale converter subtype?


Doug

--
Doug Wyatt
Core Audio, Apple

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  >kAudioUnitType_FormatConverter subtypes (From: Rustam Muginov <email@hidden>)




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