Re: [Alsa-user] Duplicate sound in two sound cards
Le Sun, 29 Oct 2006 13:52:52 -0500, Lee Revell [EMAIL PROTECTED] 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=lnkkid=120709bid=263057dat=121642 ___ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user -- Dominique Michel -- N.B.: Tous les emails que je reçois sont filtrés par spamassassin avant de me parvenir. Si vous attendez une réponse de ma part et que vous ne la recevez pas, cela signifie qu'en toute vraisemblance, votre courrier ne m'est pas parvenu car vous figurez sur une des listes de http://www.spamhaus.org. - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.phpp=sourceforgeCID=DEVDEV ___ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
Re: [Alsa-user] Duplicate sound in two sound cards
On Sat, 16 Dec 2006 10:36:03 +0100 Dominique Michel [EMAIL PROTECTED] wrote: Le Sun, 29 Oct 2006 13:52:52 -0500, Lee Revell [EMAIL PROTECTED] 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=lnkkid=120709bid=263057dat=121642 ___ Alsa-user mailing list Alsa-user@lists.sourceforge.net 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 that the 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 IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.phpp=sourceforgeCID=DEVDEV ___ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
Re: [Alsa-user] Duplicate sound in two sound cards
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. 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=lnkkid=120709bid=263057dat=121642 ___ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
Re: [Alsa-user] Duplicate sound in two sound cards
On 10/29/06, Salatiel Filho [EMAIL PROTECTED] 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 ? You could also use pulseaudio or MPD. -- avuton -- Anyone who quotes me in their sig is an idiot. -- Rusty Russell. - 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=lnkkid=120709bid=263057dat=121642 ___ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user