Removing bass output

[lorien420]

It seems that all speakers worth a damn now are manufactured with a subwoofer that you can't turn off. I actually have this sub set with the bass wheel all the way to the zero position, but it's still outputting this obnoxious air. I have roommates and can't have the room shake all of the time.

Does anybody know a way with an ALSA plugin, or anything else for that matter, to stop all bass output. It's the only way I can think of to turn it off.

[ianegg]

I don't know how to do it, but, you need to use a LADSPA plugin. I saw a guide somewhere when I was first settign up my soundcard, but I couldn't figure it out and found another way to do what I wanted.

I can't find this guide anymore, but I'll keep looking, but try searching for LADSPA yourself, cos I'll probably get bored quickly.

EDIT: http://alsa.opensrc.org/index.php?page=SurroundSound
I think that's the page I was thinking of. It uses lpf for the subwoofer channel, but I imagine if you use hpf (a simple high pass filter, aparently) you can do what you want.

I have no idea how to get LADSPA working though. There's no /usr/lib/ladspa on my system, and it's not in portage. I imagine what you'd put in ~/.asoundrc would be something like this:

[lorien420]

Okay, I took that code and tried it out. First I used the default device, which is some sort af alias to swmix. I ran into a series of problems. Firstly, here's my asound.conf file without that added:

[ianegg]

Sorry, I never figured out how to get a lowpass filter working, mainly due to the lack of documentation, and the vagueness of what little I could find. I've had a look around for anything more useful, but have had no luck, so I can't really offer you any more help.