[PD] earplug~ or FIR~ for HRTF?

Nicholas Mariette nicholas.mariette at limsi.fr
Thu Sep 4 16:44:59 CEST 2008

IEM's bin_ambi is a sophisticated binaural rendering system via higher  
order Ambisonic spatialisation to virtual speaker arrays.

FIR~ is very CPU intensive for HRTF processing.  It's much better to  
use frequency domain convolution with fft~ & ifft~ which is the case  
with bin_ambi.

I've listed some publicly available HRTF sets on my blog here:



On Sep 4, 2008, at 4:09 PM, Claude Heiland-Allen wrote:

> Hi all,
> I'm considering whether to use the earplug~ HRTF external or some
> alternative implementation of binaural spatialization.
> On the plus side, earplug~ seems quite easy to use.
> On the down side, earplug~ seems not to handle any sample-rate stuff  
> at
> all, so I'm wondering which samplerate the impulse responses in the
> earplug_data.txt are sampled at (because obviously it would be  
> somewhat
> weird to use them at another rate...).
> I don't really need the interpolation provided by earplug~ either,  
> so I
> guess I could save some CPU by using FIR~ directly, but then I need to
> obtain some HRIR's (ideally both at 44100Hz and 48000Hz sample rates).
> So: has someone already made a binaural processing patch using FIR~  
> and
> some set of impulse responses and would care to share it?
> Some context for the curious:  I'm trying to auralize 4D space using  
> 4D
> room simulation, with an "ear" made up of several co-solid listening
> points in the 4D space, each mapped to a 3D source point for binaural
> processing.
> Thanks for any tips,
> Claude
> -- 
> http://claudiusmaximus.goto10.org
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