Re: [alsa-devel] Switching from default to plughw:0,0
Gonzalo Garramuño wrote:
El 10/09/16 a las 20:46, Clemens Ladisch escribió:
Gonzalo Garramuño wrote:
My problem is that when I choose the default, which is equivalent to plughw:0,0
The default actually is PulseAudio or dmix.
dmix is not installed in my system
It's part of ALSA.
Do I have to deal with the pulseaudio api, instead of the ALSA api?
When PulseAudio is configured as the default, it can be accessed through the ALSA API.
Anyway, the correct name for the default device is "default".
To get a list of devices, see "aplay -L".
Regards, Clemens
El 11/09/16 a las 07:58, Clemens Ladisch escribió:
When PulseAudio is configured as the default, it can be accessed through the ALSA API.
How exactly?
Anyway, the correct name for the default device is "default".
To get a list of devices, see "aplay -L".
Here's the output of aplay -L $ aplay -L
default Playback/recording through the PulseAudio sound server null Discard all samples (playback) or generate zero samples (capture) pulse PulseAudio Sound Server sysdefault:CARD=PCH HDA Intel PCH, ALC1150 Analog Default Audio Device front:CARD=PCH,DEV=0 HDA Intel PCH, ALC1150 Analog Front speakers surround21:CARD=PCH,DEV=0 HDA Intel PCH, ALC1150 Analog 2.1 Surround output to Front and Subwoofer speakers surround40:CARD=PCH,DEV=0 HDA Intel PCH, ALC1150 Analog 4.0 Surround output to Front and Rear speakers surround41:CARD=PCH,DEV=0 HDA Intel PCH, ALC1150 Analog 4.1 Surround output to Front, Rear and Subwoofer speakers surround50:CARD=PCH,DEV=0 HDA Intel PCH, ALC1150 Analog 5.0 Surround output to Front, Center and Rear speakers surround51:CARD=PCH,DEV=0 HDA Intel PCH, ALC1150 Analog 5.1 Surround output to Front, Center, Rear and Subwoofer speakers surround71:CARD=PCH,DEV=0 HDA Intel PCH, ALC1150 Analog 7.1 Surround output to Front, Center, Side, Rear and Woofer speakers iec958:CARD=PCH,DEV=0 HDA Intel PCH, ALC1150 Digital IEC958 (S/PDIF) Digital Audio Output dmix:CARD=PCH,DEV=0 HDA Intel PCH, ALC1150 Analog Direct sample mixing device dmix:CARD=PCH,DEV=1 HDA Intel PCH, ALC1150 Digital Direct sample mixing device dsnoop:CARD=PCH,DEV=0 HDA Intel PCH, ALC1150 Analog Direct sample snooping device dsnoop:CARD=PCH,DEV=1 HDA Intel PCH, ALC1150 Digital Direct sample snooping device hw:CARD=PCH,DEV=0 HDA Intel PCH, ALC1150 Analog Direct hardware device without any conversions hw:CARD=PCH,DEV=1 HDA Intel PCH, ALC1150 Digital Direct hardware device without any conversions plughw:CARD=PCH,DEV=0 HDA Intel PCH, ALC1150 Analog Hardware device with all software conversions plughw:CARD=PCH,DEV=1 HDA Intel PCH, ALC1150 Digital Hardware device with all software conversions hdmi:CARD=NVidia,DEV=0 HDA NVidia, HDMI 0 HDMI Audio Output hdmi:CARD=NVidia,DEV=1 HDA NVidia, HDMI 1 HDMI Audio Output hdmi:CARD=NVidia,DEV=2 HDA NVidia, HDMI 2 HDMI Audio Output hdmi:CARD=NVidia,DEV=3 HDA NVidia, HDMI 3 HDMI Audio Output dmix:CARD=NVidia,DEV=3 HDA NVidia, HDMI 0 Direct sample mixing device dmix:CARD=NVidia,DEV=7 HDA NVidia, HDMI 1 Direct sample mixing device dmix:CARD=NVidia,DEV=8 HDA NVidia, HDMI 2 Direct sample mixing device dmix:CARD=NVidia,DEV=9 HDA NVidia, HDMI 3 Direct sample mixing device dsnoop:CARD=NVidia,DEV=3 HDA NVidia, HDMI 0 Direct sample snooping device dsnoop:CARD=NVidia,DEV=7 HDA NVidia, HDMI 1 Direct sample snooping device dsnoop:CARD=NVidia,DEV=8 HDA NVidia, HDMI 2 Direct sample snooping device dsnoop:CARD=NVidia,DEV=9 HDA NVidia, HDMI 3 Direct sample snooping device hw:CARD=NVidia,DEV=3 HDA NVidia, HDMI 0 Direct hardware device without any conversions hw:CARD=NVidia,DEV=7 HDA NVidia, HDMI 1 Direct hardware device without any conversions hw:CARD=NVidia,DEV=8 HDA NVidia, HDMI 2 Direct hardware device without any conversions hw:CARD=NVidia,DEV=9 HDA NVidia, HDMI 3 Direct hardware device without any conversions plughw:CARD=NVidia,DEV=3 HDA NVidia, HDMI 0 Hardware device with all software conversions plughw:CARD=NVidia,DEV=7 HDA NVidia, HDMI 1 Hardware device with all software conversions plughw:CARD=NVidia,DEV=8 HDA NVidia, HDMI 2 Hardware device with all software conversions plughw:CARD=NVidia,DEV=9 HDA NVidia, HDMI 3 Hardware device with all software conversions
Regards, Clemens
Thanks, Clemens. My code works with the "default" device. On the gnome-control-center, I am able to switch the default device and all works fine.
My problem is when I want my program to specify the device to use directly from the GUI: plughw:0,0. The device is in control of pulseaudio and does not release it until about 7 seconds go by with no audio. I tried a similar set up in vlc and the result was the same (vlc reported that it could not open the device), so I know it is not my code.
Let me know how can I control pulseaudio to close immediately the virtual device it opens.
participants (2)
-
Clemens Ladisch -
Gonzalo Garramuño