9 Dec
2003
9 Dec
'03
12:30 p.m.
Hello,
thank you for your answer!
Denis Sbragion wrote:
yep, you are right. To do the convolution between the
measured sweep and the inverse filter to get the impulse
response you can use brutefir (with a little trickery). I use
it to do my own measurements with 45s log sweeps. The
inverse filter is almost 2 millions taps, but brutefir eat it
without esitation even with just 64 mb of RAM available. A
truly wonderful piece of software!
But, how can I learn to use it in such a way??? I haven't found
any clue on the web page how to use a binary file as input data
for bruteFIR. Are your scripts helpful in that?
Doing it under Linux is a bit more complicated. If you
want I
have some shell scripts that do all the steps needed to get
the impulse response (sweep playing & recording +
econvolution). Anyway they are just a clumsy hack that I use
myself for my measurements, don't expect any fancy interface.
Despite this, thanks to the brutefir floating point accuracy
and the long sweep used the results are state of the art (90+
dB of S/N even in a not so quiet environment with a dirty
cheap panasonic WM-60A capsule and a DIY mic preamp).
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.
What do you use for creating the sweeps?
Let's make the linux convolution reverb real!
Yours
Uwe Koloska
--
voiceINTERconnect www.voiceinterconnect.de
... smart speech applications from germany