HI, Sorry for coming back to this post after long time. >Anyway, I had the > same problem and I still didn't get dmix and multi plugins to work > together. So is this a bug? If it is then I would like to file a bug report. Could someone point me to url where I can submit a one? > Now, about your problem: I'm not sure whether I really understand it. > What you want to do is record stuff with one sound card while playing > other stuff with the other sound card, right? Why don't you just define > one device pointing to the input device of the first sound card using > this device for recording, and another device pointing to the playback > device of the second sound card using it for playback? > > If the reason is that the applications you are using need one device > that it playback and recording device at the same time, just use the > asym plugin (http://alsa.opensrc.org/Asym). > > I hope this helps... > > Regards, Ingo > > Kibanadai schrieb: > > Dear all, > > > > Hello to everyone as this is my first email to the list. I would start > > with some background to the problem first. > > > > Background > > ------------- > > > > (1) My laptop's sound card has stopped playing from the speakers as well > > as from the headphones due to internal hardware problems. I think it is a > > connection problem from inside as the sound card itself works. > > > > (2) Hence, I have bought a c-media usb sound card with inbuilt FM > > transmitter so that I can play my sound from computer to the receiver > > which can tune to FM frequencies of my choice. > > > > (3) I successfully setup my .asoundrc to use asym to have dmixed output > > and capturing capability from Mic in of my laptop (yes, as I said just > > laptop speaker and headphone jack stopped working). I have defined dsp0 > > also so that the program using oss could also use the sound card. With > > that setup my skype, vmware and everything works as per the expectation. > > > > Problem > > --------- > > > > (1) Now the problem I am facing is that I would like to record some music > > using audacity. As my USB audio doesn't have any capture device or mixer > > built in, the only option I get to choose is capture devices provided by > > my on-board sound card. But due to my .asoundrc file which uses usb audio > > as actual hardware devices, my onboard sound card doesn't get any sound > > at all and hence no recording possible in Audacity. So, I came up with > > following idea. > > > > (2) I setup a 4 channel virtual device using on-board sound card and usb > > sound card using multi plugin. I have used ttables in such a way that the > > sound is copied to both the devices. The idea worked great. I could > > listen to the music through USB sound card as well as record using > > audacity. Please look at the following piece of settings in .asoundrc > > just for using multi plugin. ============================ > > pcm.audacity { > > type plug > > slave.pcm "multi" > > ttable.0.0 1.0 > > ttable.1.1 1.0 > > ttable.0.2 1.0 > > ttable.1.3 1.0 > > } > > > > > > pcm.multi { > > type multi > > slaves.a.pcm "hw:1" > > slaves.a.channels 2 > > slaves.b.pcm "hw:0" > > slaves.b.channels 2 > > > > bindings.0.slave a; > > bindings.0.channel 0; > > bindings.1.slave a; > > bindings.1.channel 1; > > bindings.2.slave b; > > bindings.2.channel 0; > > bindings.3.slave b; > > bindings.3.channel 1; > > } > > > > pcm.!default { > > type plug > > slave.pcm "audacity" > > } > > ctl.audacity { > > type hw; > > card 0; > > } > > > > ======================= > > > > > > The problem with this idea is that I loose the dmixing capabilities on my > > USB sound card. I tried to insert dmix plugin in the above chain. So I > > wrote following .asoundrc.but I get no sound at all using aplay or any > > other application. I have read only one post on this mailing list > > pointing out the same problem but didn't have definite answer at the end > > that it is not possible. I suspected if multi plugin takes any other > > virtual device other than dmix and hence tried to use copy plugin instead > > of dmix and that also doesn't work. However, > > http://alsa.opensrc.org/How_to_use_softvol_to_control_the_master_volume > > describes using virtual devices with multi plugin. Thus, it is not clear > > why multi won't work with dmix or my test with copy plugin in the chain. > > > > (a) So could someone confirm that multi plugin to dmix chain is broken or > > I am doing something wrong? > > (b) In fact, I can alwasy use working multi plugin .asoundrc before > > starting to play any music which I want to record but you know it is > > combursome to everytime remember to do that > > (c) Can someone point out some alternative to be able to use audacity in > > my setup described above? > > > > Sorry for the long post. > > ========================= > > pcm.audacity { > > type plug > > slave.pcm "multi" > > ttable.0.0 1.0 > > ttable.1.1 1.0 > > ttable.0.2 1.0 > > ttable.1.3 1.0 > > } > > > > > > pcm.multi { > > type multi > > slaves.a.pcm "dmixer" > > slaves.a.channels 2 > > slaves.b.pcm "hw:0" > > slaves.b.channels 2 > > > > bindings.0.slave a; > > bindings.0.channel 0; > > bindings.1.slave a; > > bindings.1.channel 1; > > bindings.2.slave b; > > bindings.2.channel 0; > > bindings.3.slave b; > > bindings.3.channel 1; > > } > > > > # playback channel > > pcm.dmixer { > > type dmix > > ipc_key 1024 > > slave { > > pcm "hw:1,0" > > period_time 0 > > period_size 1024 > > # preserve true > > > > buffer_size 8192 > > #periods 128 > > rate 44100 > > } > > bindings { > > 0 0 > > 1 1 > > } > > } > > pcm.!default { > > type plug > > slave.pcm "audacity" > > } > > ctl.audacity { > > type hw; > > card 0; > > } > > ======================== > > > > > > Regards, > > > > kibanadai Regards, Kibanadai ------------------------------------------------------------------------- Take Surveys. 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