ke, 2009-08-26 kello 12:10 +0800, Ng Oon-Ee kirjoitti: > Hi all, > > I know back in March there was a conversation about alsa devices to be > used with load-module module-alsa-sink. Basically, Lennart mentioned > NEVER to use device=hw:0,0 (I do that, though, as I don't use > module-hal-detect so that I can choose which modules I want through a > script). However, I don't see any discussion on how to choose another > device. So, two questions:- > > 1. Instead of "load-module module-alsa-sink device=hw:0,0", what should > I be using to load the appropriate device? Assuming I'm not using > module-hal-detect. http://www.opensubscriber.com/message/fedora-devel-list at redhat.com/12018387.html > 2. I'm interested in using an alsa plugin to modify pulse's output > before it hits my card. Specifically the alsaequal plugin. I have > specified it in my .asoundrc as below:- > > ctl.equal { > type equal; > } > pcm.plugequal { > type equal; > slave { pcm "plughw:0,0" } > } > pcm.equal { > type plug; > slave.pcm plugequal; > } > > This works properly with aplay -D equal, of course. How do I modify my > device string in load-module module-alsa-sink to use the 'equal' output, > so that I can dynamically equalize the output before it hits the > speakers? Is this even possible? load-module module-alsa-sink device=equal You might also want to change the slave { pcm "plughw:0,0" } line to slave { pcm "plug:front:0" } just to reduce ugliness (= unneeded assumptions). I'm not 100% sure that works, though. If it doesn't, just revert to the old version. Hmm... since pcm.equal is already of type plug, I think the line can be simplified to slave { pcm "front:0" } I'm not totally sure about this either (fiddling with alsa config isn't one of my hobbies). There are other approaches to equalization, but I don't feel like going in the details of those if this works for you. If you're interested, I just point you to this: https://tango.0pointer.de/pipermail/pulseaudio-discuss/2009-August/004730.html -- Tanu Kaskinen
