[linux-audio-user] rezound, test disk and subsonic filter

aljordan at maine.rr.com aljordan at maine.rr.com
Mon Mar 20 09:15:02 EST 2006

I am not sure how you would go about creating the test disk, and would
be interested to know what solution you come up with.

Regarding processing your music, there are two opensource packages that
I have been playing with to try digital room correction.  The packages
are Brutefir - http://www.ludd.luth.se/~torger/brutefir.html and DRC -

Basically you would take sweep measurements at the listening position
and from it create a filter for each channel that is used to process the
signal to smooth out the room response anomalies.  I find this works
pretty well in smoothing out the bass and fleshing out the midrange in
my system, as I have a wicked room hump at around 40hz and some dips
around 80hz.  You can set target response curves and I have found that I
can get a reasonably flat response down to 25hz with a single well
positioned subwoofer.

The drawbacks are that the software is not easy to understand and
implement, and there is a bit of a processing lag when the filters are
in place.  The processing lag isn't a problem for me because I only use
it for music and I am not syncing a video signal.


----- Original Message -----
From: badgers <badgers at daugird.com>
Date: Sunday, March 19, 2006 9:35 pm
Subject: [linux-audio-user] rezound, test disk and subsonic filter
To: linux-audio-user at music.columbia.edu

> Hello, I am new to this list. Please excuse my post if it is not on 
> topic.I am trying to do the following:
> create a test disk that has tracks 30 sec in length
> each track will be a specific hz frequency
> 25 hz
> 30 hz
> 35 hz
> 40 hz
> and so on....
> Once I figure out what the lowest frequency my car system can 
> reproducecleanly, I would like to try and filter out everything 
> below that frequency.
> So lets say my sub hadles 30 hz and above.
> I would like to "process" my music to remove everything below 30 hz.
> I was playing with rezound and the TAP plug-ins but I was not able 
> to get a
> clean break at a given frequency.
> any help is apprecitaed.
> thank you for your time and have a good day.
> --
> View this message in context: http://www.nabble.com/rezound%2C-test-
> disk-and-subsonic-filter-t1308910.html#a3487300
> Sent from the linux-audio-user forum at Nabble.com.

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