Re: Biquad bandpass filter for iPhone
Re: Biquad bandpass filter for iPhone
- Subject: Re: Biquad bandpass filter for iPhone
- From: "tahome izwah" <email@hidden>
- Date: Fri, 31 Oct 2008 07:14:43 +0100
Not sure where you got that code from but r b-j's original code isn't
vectorized. Try looking at http://www.musicdsp.com, his original
design is there.
--th
2008/10/30 Mark's Studio <email@hidden>:
> I am trying to port an application to the iPhone,
> the original application is using Altivec for the biquad bandpass filter,
> the original code was based on
> Cookbook formulae for audio EQ biquad filter coefficients by Robert
> Bristow-Johnson
>
> so i converted the vector code to scaler, but i can't get it to work (only
> tried the iPhone Simulator)
>
> i found a different biquad in the AUPinkNoise example,
> but it has no bandpass,
> anyone knows how to setup the bandpass parameters with a bandwidth parameter
> ?.
>
> Thanks
> Peter Mark
>
> Mark's Recording Studio A/S
> Lundeskovsvej 3
> 2900 Hellerup
> Denmark
> Tel: +45 35366078
> Fax: +45 35366038
> Mobile: +45 20416018
> www.marks-studio.dk
> email@hidden
>
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