Re: Canonical format max amp limits?
Re: Canonical format max amp limits?
- Subject: Re: Canonical format max amp limits?
- From: William Stewart <email@hidden>
- Date: Thu, 15 Jul 2004 17:32:08 -0700
Interesting discussion all round. But just to be-labour the point:
On 14/07/2004, at 3:09 PM, Steve Checkoway wrote:
>
On Jul 14, 2004, at 11:42 AM, Mark Cookson wrote:
>
> The clip routines in the audio kernel extensions don't use AltiVec.
>
> It's possible, but not encouraged, to use AltiVec in the kernel (just
>
> like it's possible, but not encouraged to use floating point in the
>
> kernel, only more so).
>
>
Now I'm a little confused. Is this code handled in kernel space or
>
user space? "This code" being the AudioConverter code.
>
>
All things considered, what is the best way to convert audio samples
>
from 16 bit integer to 32 bit float? By hand, taking into account all
>
of the previously mentioned potential pitfalls, or using the
>
AudioConverter, or perhaps some other method?
AudioConverter.. Now, this object is used by several of our AudioUnits
(The device AU's - AUHAL and its children).. and AUConverter - so
chances are you are using these already...
Oh, and its *considerably faster* than doing a divide by 32768 (or a
multiply by 1/32768)!
Bill
>
>
- Steve
>
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