Thank you for the reply and sorry for my delay, I just missed you email. This is the output of amixer -c1 : [fabio at dell ~]$ amixer -c1 Simple mixer control 'Master',0 Capabilities: volume pswitch pswitch-joined Playback channels: Front Left - Front Right Capture channels: Front Left - Front Right Limits: 0 - 31 Front Left: 31 [100%] Playback [on] Front Right: 31 [100%] Playback [on] Simple mixer control 'PCM',0 Capabilities: volume pswitch pswitch-joined Playback channels: Front Left - Front Right Capture channels: Front Left - Front Right Limits: 0 - 31 Front Left: 29 [94%] Playback [on] Front Right: 31 [100%] Playback [on] Simple mixer control 'Surround',0 Capabilities: volume pswitch pswitch-joined Playback channels: Front Left - Front Right Capture channels: Front Left - Front Right Limits: 0 - 31 Front Left: 31 [100%] Playback [on] Front Right: 31 [100%] Playback [on] Simple mixer control 'LFE',0 Capabilities: volume pswitch pswitch-joined Playback channels: Front Left - Front Right Capture channels: Front Left - Front Right Limits: 0 - 31 Front Left: 31 [100%] Playback [on] Front Right: 31 [100%] Playback [on] Simple mixer control 'Line',0 Capabilities: volume pswitch pswitch-joined Playback channels: Front Left - Front Right Capture channels: Front Left - Front Right Limits: 0 - 31 Front Left: 0 [0%] Playback [off] Front Right: 31 [100%] Playback [off] Simple mixer control 'Line In',0 Capabilities: volume pswitch pswitch-joined Playback channels: Front Left - Front Right Capture channels: Front Left - Front Right Limits: 0 - 31 Front Left: 28 [90%] Playback [on] Front Right: 31 [100%] Playback [on] Simple mixer control 'CD',0 Capabilities: volume pswitch pswitch-joined Playback channels: Front Left - Front Right Capture channels: Front Left - Front Right Limits: 0 - 31 Front Left: 31 [100%] Playback [off] Front Right: 31 [100%] Playback [off] Simple mixer control 'Microphone',0 Capabilities: volume pswitch pswitch-joined Playback channels: Front Left - Front Right Capture channels: Front Left - Front Right Limits: 0 - 31 Front Left: 31 [100%] Playback [off] Front Right: 31 [100%] Playback [off] Simple mixer control 'Video',0 Capabilities: volume pswitch pswitch-joined Playback channels: Front Left - Front Right Capture channels: Front Left - Front Right Limits: 0 - 31 Front Left: 31 [100%] Playback [on] Front Right: 31 [100%] Playback [on] Simple mixer control 'Phone',0 Capabilities: volume pswitch pswitch-joined Playback channels: Front Left - Front Right Capture channels: Front Left - Front Right Limits: 0 - 31 Front Left: 31 [100%] Playback [off] Front Right: 31 [100%] Playback [off] Simple mixer control 'Mono',0 Capabilities: volume pswitch pswitch-joined Playback channels: Front Left - Front Right Capture channels: Front Left - Front Right Limits: 0 - 31 Front Left: 31 [100%] Playback [off] Front Right: 31 [100%] Playback [off] Simple mixer control 'AUX',0 Capabilities: volume pswitch pswitch-joined Playback channels: Front Left - Front Right Capture channels: Front Left - Front Right Limits: 0 - 31 Front Left: 31 [100%] Playback [off] Front Right: 31 [100%] Playback [off] Sorry, but in the previous mail I didn't express myself clearly: running the parecord command it creates a file of 44bytes parecord -d alsa_input.pci-0000_00_1d.7-usb-0_6.analog-stereo --file-format=wav test.wav [fabio at dell ~]$ file test.wav test.wav: RIFF (little-endian) data, WAVE audio, Microsoft PCM, 16 bit, stereo 44100 Hz [fabio at dell ~]$ strings test.wav RIFF$ WAVEfmt data I've tried to route the sound from the USB TV source to the Internal sink with the loopback module with no luck: pactl load-module module-loopback source="alsa_input.pci-0000_00_1d.7-usb-0_6.analog-stereo" sink="alsa_output.pci-0000_00_1b.0.analog-stereo" Thank you for any hint, - Fabio 2013/2/18 Tanu Kaskinen <tanuk at iki.fi> > > On Sun, 2013-02-17 at 20:55 +0100, Fabio Venturi wrote: > > Running the command > > parecord -d alsa_input.pci-0000_00_1d.7-usb-0_4.analog-stereo > > --file-format=wav > /tmp/test.wav > > produces a completely silent WAV file. > > But it produces silence at least? That's good to know, because it means > that alsa is at least giving some audio to pulseaudio. > > > I've tried to play around with pavucontrol options with no luck. > > The source appears to be unmuted and the volume is at maximum, so there > doesn't seem to be any problem in the pulseaudio configuration. > > You could attach the output from "amixer -c1". It might be that some > alsa mixer control is misconfigured. > > -- > Tanu >
