On 10 February 2014 22:59, Matt Garman <matthew.garman@xxxxxxxxx> wrote: > I currently have three pairs of speakers, and intend to add a fourth > as soon as this is all squared away (the wiring for the fourth is > already in place, I just need to connect them to speakers). The > existing three pairs of speakers are the in-ceiling speakers I've been > talking about. The fourth pair of speakers will be traditional > full-range speakers. That's one reason why I want to send the > full-range signal to the power amp (and in turn the speaker selector). > > I think you might be confusing the AVR with the speaker selector; they > are two different devices. The speaker selector is a passive device > (it doesn't require external power). It simply allows an amplified, > speaker-level signal to be multiplexed. Without such a device, I > would indeed need to have a 1:1 power amp to speaker pair ratio. I thought that you wanted to control the speaker selection from linux, and since the speaker selector is not computer controlled then the other way to achieve it would have been to have the channels controllable from linux. Ah, since you have 4 output channels then the solution I provided in my previous e-mail will work just fine for you. (I'll link it again incase you missed it http://alsa.opensrc.org/Low-pass_filter_for_subwoofer_channel_%28HOWTO%29 ) You will only use 3 of the channels (set it up as L, R, M), no need to fuss with a Y-adapter then. Although if you could use jackd as the audio output instead of alsa, then it would be easier to just use Fons' awesome zita-lrx to upmix the channels, with the added bonus of a crossover. http://kokkinizita.linuxaudio.org/linuxaudio/downloads/index.html I would also like to second Fons' suggestion to hi-pass the signals sent to the ceiling speakers, you can turn off the highpass when you switch to the fullrange speakers. Audio quality aside, sending LF to speakers that are too small to produce them is just a waste of power. Too much cone excursion will damage the ceiling speakers. _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
