On Tue, 2010-08-03 at 20:17 +0200, Jörn Nettingsmeier wrote: > On 08/03/2010 07:45 PM, Fernando Lopez-Lezcano wrote: > > > > Hmmm, so, you send WXYZ to the four subs and whatever order you can > > decode to the regular speakers (6, 8, etc). Sounds good. > > it does :) except you'd usually throw away z,
Yes, of course, that was my mistake - I don't have subs in the ceiling or floor (yet :-) > > What if you want to include a crossover? (that's exactly what I'm > > working on right now in the openmixer software). > > > > So, you high pass WXYZ and send that to the regular speakers, low pass > > WXYZ and send that to the subs... and what do you do with the rest of > > the Ambisonics components? I imagine I would just send the full > > frequency range to the regular speakers and let them do the best they > > can, right? > > hmm, i think i would rely on the internal electronics of the tops for > the HPF and feed them a full-range signal of all components, and then > maybe measure one and design a suitable roll-off for the bass > speakers... but i have never had the luxury to do that, i always set the > LPF by ear. I currently have 8 Mackie 824's at ear level, 4 624's in the ceiling and 4 624's below the floor (and I will add two more 624's, one zenith, one nadir). So their frequency responses don't exactly match in the low end. Right now I'm writing a software crossover with HPF / LPF sc ugens (12dB/oct butterworths). > sending high-passed WXYZ and full-range higher orders to the tops won't > work well, i guess. if you want to take care of the band-splitting in > your mixer, your best bet would be ganged high/low-pass filters for all > the orders. That is what I'm currently trying. I still don't have a clear idea of what would be best - or even reasonable - in terms of high order components (at this point in time I only have 2 subs so I'm sending them just W, but the code supports 4 and I plan to have that setup soon, at least for testing). Fons? -- Fernando _______________________________________________ Linux-audio-dev mailing list [email protected] http://lists.linuxaudio.org/listinfo/linux-audio-dev
