[LAD] [Ann] Folve: Fuse file system that convolves flac files on-the-fly

Fons Adriaensen fons at linuxaudio.org
Sun Sep 23 19:40:49 UTC 2012

On Sun, Sep 23, 2012 at 10:17:10AM -0700, Henner Zeller wrote:

> The latest version now contains a simple highpass- and lowpass-filter
> to test out the configuration. And a description how to get the Santa
> Lucia Basilica reverb example from the jconvolver demo distribution.

Be careful when using the Santa Lucia IR. It's the recording of a 
gunshot, so the direct sound is a) clipped and b) low-fi. The file
that comes with jconvolver cuts of the direct (dry) sound for that
reason, assuming the normal signal path through a mixer will add it.

In this case it has to be added to the IR. You need something like

#               in out  gain  delay  offset  length  chan      file  
/impulse/read    1   1   0.1  1400    1400       0    1   santalucia.wav
/impulse/read    2   2   0.1  1400    1400       0    2   santalucia.wav
/impulse/dirac   1   1   1    0
/impulse/dirac   2   2   1    0

The ratio of the 'gain' parameters determines the wet/dry ratio.

You can use this at either 44.1 or 48 kHz, the only difference
will be a slightly different (10%) reverb time.



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