Hi! The thread on the mailing list may have been my one. Anyway, I had the same problem and I still didn't get dmix and multi plugins to work together. 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 ------------------------------------------------------------------------- Take Surveys. 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