Ubuntu Multimedia :: Outputing To Two Audio Devices At Once?
Jun 6, 2010
My band play with a backing track running out of my laptop. We have a stereo mix of the backing track running into the PA system, plus another stereo mix of the backing track with a metronome running into headphones worn by our drummer. This means that the laptop is outputting 4 audio channels simultaneously. The catch is, i only have a two channel USB audio device, in addition to the two channel built-in soundcard. The trick i found to accomplishing what i desire within Windows was relatively simple - i used the ASIO4ALL driver, which effectively allowed me to combine the outputs into one "virtual" ASIO audio device which has 4 output channels, which i could then send audio to using my digital audio workstation software (REAPER). Luckily this has worked perfectly every time we've done it on stage, however at rehearsals it has on occasion failed as Windows has encountered errors, etc. Naturally it would be devastating for this to happen on stage, and so i've decided to try Linux out, as it has the reputation of being extremely stable (i've heard stories about machines being switched on for years without crashing).
Now, i've tried for a couple of days to get this to work, messing around with JACK, ALSA, and PortAudio, and using a range of programs such as Qtractor, Ardour, and MusE; however, i've only ever been able to get stereo audio to come out of one device at a time. I do however know that it is possible to do what i want, because i found a little DJ application which allowed me to set a different audio device to be in "headphones", whilst my other audio device outputs the currently playing track.
I'm by no means a proficient Linux user, however if something has to be done through a Terminal, with adequate instructions i'm sure i could do it. What i'm after though really, is a simple and clear guide to accomplishing what i want, which to recap is:
A to simultaneously output audio to two separate audio devices at once from within the same program.
I am using Ubuntu 10.04 LTS - the Lucid Lynx. I am using the laptop to play video files and view it on TV using HDMI output. No problems. Requirement: to play simultaneously a different media file and be able to listen through say headphone / laptop speakers. While a movie audio is only heard on TV, other audio is heard only on laptop speaker.
On a fresh install of squeeze (with the exception of some installed video firmware and the latest updates from the repos) from the kde cd.
System is running an ASUS Sk8V motherboard with onboard sound, also a SB Audigy 2 ZS sound card. Speakers are plugged into the sound card.
Sound worked fine before in Lenny except I had to create /etc/modprobe.d/sound with the following to get the system to prioritize the SB card over the onboard audio
I am running a java-based music player on two machines, one running 11.2 and the other running 11.3. I wrote the code myself, so I have complete control over it. Both machines have Sun java development kit installed, and both have version 1.6.0. The tracks of a given album are each played by a separate thread. Each thread requests the use of the audio device and plays through it. Under 11.2, the device is then locked for the use of this thread, and once the playing is through the lock on the device is automatically removed and the next thread starts playing its music without difficulty. I have no control over this lock, though. It appears to happen at the OS level, independently of my code.
When the exact same code is running under 11.3 the first thread plays through as before, but then the next thread does not manage to get hold of the audio device. It appears to play but no music is heard. When it finishes and the third thread tries to start, I get a "line unavailable" exception. difference between 11.2 and 11.3 in the locking mechanism of audio devices by an application? Is there anything programmatic I can do to remove the lock myself?
Say I have 2 speakers connected to 2 different sound cards. Under Windows, is it possible to have some sort of virtual device that would forward an audio stream to both sound cards? If this can't be easily done under Windows, a solution for Linux is also fine. lternatively, if the 2 speakers are connected to different channels of a sound card, is there any vendor-independent way to duplicate audio to both channels?
I've an older PC, and I would like to use it with Lubuntu, because it's much faster than Ubuntu or Win XP (excuse me for the comparison). The only thing that prevents me from using Lubuntu is that I can't find any application to switch the sound card! How can I switch audio devices from Lubuntu?
I want to output two applications one to a headphone and another to the regular speakers, what app can I use?? it would be better if I don't have to move from audio player, I tried with alsa sound mixer but for some readon it doesn't list the speakers
I've just been setting up my new Revo with Ubuntu for use as a HTPC with XBMC etc.. Previously I had audio coming out through HDMI, but now I have lost all devices under the sound settings.
I was using alsa mixer, is there any way of getting this working again? A HTPC without sound is a bit useless!
I can't really say what I've done, as I took a few approaches to it, but I've tried to remove everything so it's back to normal. I think maybe it happened after updating some NVIDIA drivers..
For some reason on any application that uses sound, but doesn't allow me to specify the input/output audio devices I don't get anything. I want all audio to go to my USB Headset, and not the onboard soundcard. To start off with, here's alsamixer: Here's a screenshot from Mumble (voice chat) that shows that I've set the USB headset device in there, and it works 100% fine on Mumble.
[Code]...
As you can see from the alsa-base.conf above I've tried specifying snd_usb_audio as the default device, but it's not working.
I always keep my headphones as well as my 2.1 speakers connected simultaneously on my PC (Gigabyte motherboard). Both these audio devices work fine simultaneously on my Windows 7, but in Ubuntu, only my headphones work, speakers don't work at all. I tried changing some settings in SOUND PREFERENCES as well as ALSA SOUND MIXER, but not luck so far.
How can I change my audio output (and input) from one device to another?
(Using a Sound Blaster and USB Headphones)
Changing settings in Phonon is a hassle, and it still won't change the sound immediately for the apps... Is there a quick way to just disable one device and enable the other, without having to restart the apps that use them? (For instance, right now Skype and my browser are outputting to headphones and amarok to my speakers - one enabled device that receives everything, bang! output for everything to another device and the first device is having a nap)
I can't see any settings in KMix to facilitate such a change...
what I can do to change sound cards quickly and easily?
I recall doing this in seconds in Ubuntu via their mixer, so would it be similar if I ditched KDE in favor of Gnome??
I want to listen to this audio file: [URL] but my real player 11.0.0.4028 gold desn play it, it says that there is a codec 28_8 missing, I go to relaplayer page, download the last release available for linux systems, but the message is the same : audio codec missing and doesn't play the audio.
I havev tried to play the audio with smplayer (not luck), vlc can play the audio but the pause button doesn't work so I have to listen the entire audio all the time I stop it playing. Is there any audio player capable od reproducing in the proper way this audio in ubuntu? No one of my video players totem, smplayer, realplayer or vlc are capable of playing this video: [URL]
I'm thinking of installing openSUSE-11.1 Gnome on a Fujitsu-Siemens Amilo 7400M laptop because the wireless in Gnome is much more user friendly than KDE3/KDE4 in openSUSE-11.1. The idea is to give this laptop to my 84-year old mother and things need to 'just work' for her (she currently has a desktop running openSUSE-11.1 KDE3 that uses a WIRED interface to the web).
I refuse to update this laptop to openSUSE-11.2 nor 11.3 (nor other recent distributions) because every kernel update after the 2.6.27 kernel has broken the Intel i855GM graphics drivers for that laptop. There are many bug reports and none have fixed the problem for this Fujitsu-Siemens implementation of the i855GM graphics.
Hence I am looking at Gnome.
I booted the laptop to a Gnome openSUSE-11.1 liveCD and wireless is easy and works great. But audio is very very VERY bad. It is incredibly user unfriendly and it does NOT work well. I assume that is because pulse audio in openSUSE-11.1 was very immature.
I note these updated packages in the openSUSE-11.1 update repository:
Code:
So my question is, did the updates to pulse audio (in the openSUSE-11.1 update repository) fix the pulse audio situation? Are there ANY helpful views on this?
Currently my wife is using this laptop with KDE-4.4.4 (and openSUSE-11.1) so I can't just install Gnome and play with it without taking the laptop away from her for a while (note the hard drive is too small for a dual boot of KDE/Gnome).
dell inspiron e1505 3.2 gb ram 1.86 ghz intel core duo ati x1400 gfx opensuse 11.4 kde 32 bit.
okay, here are the details: can't play any audio with amarok when desktop effects are enabled because the minute a window is moved, it will distort the audio. even when disabling desktop effects, some applications still cause this. can't play videos videos even with desktop effects disabled because of the same reason.
i just switched from ubuntu and when i ran version 11.04, i had to disable kms to do anything. i tried on opensuse 11.4 and the audio was flawless but the gfx went all to hell.
Preliminary checks of sound level settings and obvious dumb stuff but there is still no sound. The problem seems to be that the system does not recognize the existence of the sound card and insists on using alternative audio devices.
I am having some issues with getting Ubuntu Studio 10.04 to work correctly on my system. Everything works fine except sound. I have a M-Audio Delta 66 audio interface and my onboard sound is disabled. When I run the command alsaconf I can see the ICE1712 card without issue. However when I run alsamixer the only option it is giving me is my HD sound from my ATI video card. For some reason it seems the ATI card has locked the audio to it with no way to remove it. I have reinstalled the alsa drivers for my card and can only see it through alsaconf. When I tell alsaconf to configure the ICE1712 card it says it configured it properly.When I run the command envy24control it says no ICE1712 cards were found.
Is there an application that anyone knows about that I can use to convert either an .flv or .ogg file that contains both audio and video to just an audio .ogg file (preferably vorbis+theora) without audacity? I'm fairly certain audacity could accomplish this but it seems like overkill for what I'm trying to do and the computer I'm trying to use does not run it so well.
::EDIT:: I should also mention that I've tried looking on google. I did find downloadhelper extension for firefox which uses ffmpeg to convert the files but I don't see any obvious way to strip the video.
wanted to know if i can execute commands on linux console through a web page and redirect it back to my web page !For example :if i send a query "ls"it should execute this command on my linux console and also redirect the list of the files to the web page from which i give the command !
I just attempted to purge and reinstall ALSA (and all of it's related packages/utils) after disabling the on-board sound in an effort to use only an M-Audio Delta 1010 as the sole sound device. I've also tried to reinstall Envy24, as well as drivers for the ICE1712 chip... Now,I have no sound devices. alsamixer tells me there is such file or directory. When I go to /proc there isn't even an asoundrc file there.
I don't know what to do. I've spent the last 4 hours looking for a fix, and trying all sorts of things, even the comprehensive sound troubleshooting guide on this forum. Nothing. I got absolutely nothing. Everything goes exactly as the guide states, except after rebooting, and trying aplay -l and alsamixer, it says there's nothing installed?I have to have a sound, this machine is a DAW .End result I'm looking for is to use the Delta 1010 as the ONLY sound device.
Up until about a week ago using Kubuntu 9.10, the sound on this computer was fine, but now every day when I turn the computer on I have no sound and I get a notification from Phonon saying: The audio playback device NVidia (ALC883) does not work. Falling back to.
If I turn the computer off and then back on, sound is working again. code...
For the past few days, i have been trying to fix a common error related to mtp devices such as creative zen. Because of the new updated libmtp8 library, it is impossible to transfer files into any mtp devices. However there is a fix that will remove this issue.
1. Get the older karmic version of libmtp8 from here: URL... 2. Install this package from terminal using: sudo dpkg -i libmtp8*.deb 3. Lock libmtp8 from the synaptic package manager, so it doesn't get updated. 4. Uninstall and then downgrade any mtp packages (through packages.ubuntu.com) that become broken after step 2 to the karmic version. 5. Enjoy.
I"m running an online radio station and would like to run my headphone audio into my microphone or a virtual microphone, either way, I would like my audience to hear what I hear without having to hold the Mic to the speakers.
i am having a problem with skype that i wasn't having before, and afaik skype hasn't been upgraded recently, so something else presumably has changed.
because of driver issues i have to use an external usb audio interface to do voip. this interface is not connected to the pulseaudio server. i am able to connect it to jackd and it works fine for both audio in and out. however it no longer shows up in the list of sound devices available to skype. this used not to be the case. i have tried stopping and restarting skype, as well as unplugging and reattaching the interface. the interface does not show up in pulseaudio manager in the lists of devices.
I'm having a problem with video capture devices. I have a cheap analog capture card (encore) and a webcam.Not sure exactly why, they are mapped as /dev/video0 and /dev/video1 in diferent orders randomly as far as i can see.So, sometimes i reboot having webcam as /dev/video0 and capture card as /dev/video1. But then i reboot later, or next day, and they swap.Then, i have to change config for other programs over and over again. For example, i use tvtime to watch live tv, and i have to edit the config xml files almost everyday... Can i force devices to be always mapped the same way?Can i at least add some kind of alias to use instead of device numbers?
