Re: vDSP and iOS render callback
Re: vDSP and iOS render callback
- Subject: Re: vDSP and iOS render callback
- From: Paul Davis <email@hidden>
- Date: Tue, 24 Apr 2012 21:25:07 -0400
On Mon, Apr 23, 2012 at 4:16 PM, Kevin Dixon <email@hidden> wrote:
> Maybe I'm missing something, I was looking at this question stack
> overflow (http://stackoverflow.com/questions/3398753/using-the-apple-fft-and-accelerate-framework/3534926#3534926).
> I was under the impression that the render callback supplied sample
> data in 8.24 fixed format, yet I don't see any sort of type conversion
> going on in the example autocorrelation implementation when they call
> the FFT.
> Can anyone shed some light on this?
this is wrong. CoreAudio (like most audio SDKs) uses 32 bit floating
point as its only "native" data type. this absolutely includes the
render callback for an audio unit. unless iOS is totally different, in
which case forgive my emphasis.
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