On Fri, Jan 12, 2007 at 01:25:08PM +0000, James Stone wrote: > On 1/12/07, Georg Holzmann <georg.holzmann@xxxxxxxxxxxxxxxxx> wrote: > > > >Hallo! > > > >>> As the others already said you should at least use a highpass to > >>> remove the DC ... > >> > >> At least? Other things I should run it through? > > > >Well, you could also a limiter+etc. - but I think the biggest problem is > >the DC offset ... > >Because if you have no DC-offset you will here when it is too loud and > >can decrease the volume ... > > > I think there is a DC-offset remover ladspa plugin... FWIW, I've been experimenting with a pair of Harrison Labs FMOD passive highpass filters. They're very portable, being built into a small brass female -> male RCA adapter. They're also pretty cheap, about $25 US for a package of two. I haven't used mine much yet but they seem to work as advertised. I got the 30Hz model. That's the -3 dB point, and they're all 12 dB / octave. I'm wondering if I should have got the 50 Hz model, since the vast majority of output from typical PA subwoofers is in the 50 Hz - 200 Hz range anyway. (The fundamental of a low E on a bass guitar is about 40 Hz, but most of the energy of that note is in the first few overtones.) Supposedly you can daisy-chain two filters with an attenuator plug in the middle to make a 24 dB/octave filter with the crossover point cut in half. I haven't tried that. The website is unfortunately pretty bad, and hard to find exactly what you're looking for... http://www.hlabs.com/technical/crossovers/ List of color-coded FMOD models: http://www.hlabs.com/technical/crossovers/page2.html -- Paul Winkler http://www.slinkp.com
