Re: [AD] new resampling

[Pavel Sountsov <slabode@xxxxxxxxxx>]

On 04/21/2012 06:08 AM, Elias Pschernig wrote:
> Oh, good catch, didn't think of that. But then it should only have
> happened with linear resampling. I also don't understand why it's not
> reproducible here. Oh well, if this really fixes it I'll just conclude
> that my ears or headphones are rather bad. Or that pulseaudio does some
> unasked for post-processing, wouldn't surprise me the least.

Yes, with point resampling the metallic noise is still there. It was 
there even before these patches, however, so it's just an illustration 
of how bad point resampling is.

As for why you couldn't hear it... here's two spectra of the ex_synth 
output (peak on the left is the frequency of the sine wave - 660 Hz, and 
all other peaks are junk introduced by resampling).

http://img403.imageshack.us/img403/1895/resamplingspectra.png

I suppose there are quite a few peaks in the very high frequency ranges, 
so they can easily start approaching hardware limitations.

-SL