[linux-audio-dev] deconvolver for IR creation anyone?

[Uwe Koloska]

Am Dienstag, 9. Dezember 2003 18:06 schrieb Denis Sbragion:
> no, this is in the BruteFIR documentation. BruteFIR accepts a lot of
> input formats, including many binary formats,

uups, my fault -- I thought bruteFIR needs exponents of the FIR filter that 
has to be calculated beforehand.  But I don't realized that an impulse 
response or a recorded sweep can be used directly.

> >Could you please send me these scripts.  Since I am far more
> >better in UI design than in algortihmic debugging -- I hope to
> >make a nice tool from this skripts.
>
> See the attached file. There are two examples for 44.1 Khz & 96 Khz
> measurement (shell scripts + BF configuration).

Maybe I am too dumb, but I can't make it work ...

Here is what I have done:
1. create a sweep of 40s with AudioEase's "Make A TestTone 2.0"
(the wav files created with that prog cannot be read by sndfile-convert but 
with wavesurfer/snack ...)
2. play the sweep with Spark LE on an iBook through a microverb into ardour 
running on my linux box with NVIDIAs onboard sound
3. revert the sweep in time and create a float32 raw file for use with 
bruteFIR
4. use bfcfg44 configuration for bruteFIR

but the output is empty (all floats have an exponent of -19..21)

And even the sweep directly fed into bruteFIR gives an empty file.

> >What do you use for creating the sweeps?
>
> I used the Aurora plugins from Angelo Farina:
>
> http://www.ramsete.com/aurora/
>
> They're not free but they're free enough for my needs :)

But I don't have any windows machine ;-)

Uwe

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