3 Aug
2010
3 Aug
'10
9:45 p.m.
On Tue, 2010-08-03 at 20:17 +0200, Jörn Nettingsmeier wrote:
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).
On 08/03/2010 07:45 PM, Fernando Lopez-Lezcano wrote:
Yes, of course, that was my mistake - I don't have subs in the ceiling
or floor (yet :-)
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, 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. 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