I have been searching for a way to utilize multiple sound cards to play the same audio at the same time. My laptop has Ubuntu 11.10 x64 (3.0.0-12) w. ALSA 1.0.24. I have a pair of USB speakers that I have purchased and would like to be able to use them as well as my internal speakers.
The internal speakers and USB speakers are two separate soundcards:
aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC275 Analog [ALC275 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: Intel [HDA Intel], device 1: ALC275 Digital [ALC275 Digital]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 3: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 7: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 8: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 9: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 2: AUDIO [USB AUDIO], device 0: USB Audio [USB Audio]
Subdevices: 0/1
Subdevice #0: subdevice #0
I would like to use cards 0 and 2 (Intel and USB) I was hoping that there would be a way to create a link between the two, so that it's a system-level fix, versus having to set up each application to handle it correctly.
I am not sure if ALSA can handle this, and if not, if there would be a solution within my Linux environment to solve my problem.
