On Sat, 16 Dec 2006 10:36:03 +0100Dominique Michel <dominique.michel@xxxxxxxxxxxx> wrote: > Le Sun, 29 Oct 2006 13:52:52 -0500,> Lee Revell <rlrevell@xxxxxxxxxxx> a écrit :> > > On Sun, 2006-10-29 at 15:44 -0300, Salatiel Filho wrote:> > > Hi guys, i have two sound stereo cards on my machine and i'd like to> > > know if it is possible play the same sound in both at same time.> > > I'm not talking about virtual 4 channels sound cards , i just want ,> > > > > > > > > Channels : > > > Left on card 0 = left on card 1 > > > right on card 0 = right on card 1> > > > > > > > > Could anyone provide me a sample to put on my asoundrc ?> > > > Cannot be done easily. The two cards will consume data at different> > rates as their clocks will not be synced.> > > It can be done if you have some hardware skills and exactly the 2 same sound> cards. For that, you must use the sync of one card for the 2 cards. It mean to> remove the quartz on one card and sold a little coaxial cable from the quartz> on the first card to the removed quartz on the second card.> > Such quartz have 3 pins: input, ground and output. The shield of the coaxial> must be connected on the ground of one card but free at the other extremity> (it will do a ground loop if you connect both ends), the central wire must be> connected between the output of the quartz to the input of the removed quartz.> > Done blame me you your(s) sound card(s) goes broken after such a modification.> (It is impossible to know if it will work and if the IC on the first sound card> will be able to drive 2 cards without to try it...) Note at the parasitic> capacitance of the coaxial cable will modify the frequency a little, so use a> low capacitance cable.> > Dominique> > > You could set up 2 instances of JACK, run one for each card and connect> > them with netjack or jack_diplomat, but that will only allow you to run> > JACK-aware apps.> > > > Lee> > > > > > -------------------------------------------------------------------------> > Using Tomcat but need to do more? Need to support web services, security?> > Get stuff done quickly with pre-integrated technology to make your job easier> > Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo> > http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642> > _______________________________________________> > Alsa-user mailing list> > Alsa-user@xxxxxxxxxxxxxxxxxxxxx> > https://lists.sourceforge.net/lists/listinfo/alsa-user> > Dominique, I am not sure I understand exactly what you mean, but if it's /---------------\ | ||------------------|----+----|------| \----|------------------|| card_1 generator | | XTAL | | card_2 generator ||------------------|----+----|------| /----|------------------| | | \---------------/ , then most likely it won't work - because nobody can be shure thatthe two generator circuits connected in parallel will work. Some generator circuits allow XTAL-less operation with external clock,but then it's not the above diagram. --Sergei. -- Visit my http://appsfromscratch.berlios.de/ open source project. -------------------------------------------------------------------------Take Surveys. Earn Cash. Influence the Future of ITJoin SourceForge.net's Techsay panel and you'll get the chance to share youropinions on IT & business topics through brief surveys - and earn cashhttp://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV_______________________________________________Alsa-user mailing listAlsa-user@xxxxxxxxxxxxxxxxxxxxxxxxxx://lists.sourceforge.net/lists/listinfo/alsa-user
