Hi Clemens, 2014/1/13 Clemens Ladisch <cladisch@xxxxxxxxxxxxxx> > As you can see in the block diagram, the S/PDIF input can be routed to > both the S/PDIF output and to the analong front outputs. "Loopback" > usually means the same kind of connection, so there should be a normal > mixer control for the front output. Thank you for the response. Unfortunately I am unable to find such control myself. Below is my amixer output: pi@speaker ~ $ amixer -c 0 info Card hw:0 'Device'/'USB Sound Device at usb-bcm2708_usb-1.2.1, full speed' Mixer name : 'USB Mixer' Components : 'USB0d8c:0102' Controls : 15 Simple ctrls : 6 pi@speaker ~ $ amixer -c 0 scontents Simple mixer control 'Speaker',0 Capabilities: pvolume pswitch pswitch-joined penum Playback channels: Front Left - Front Right - Rear Left - Rear Right - Front Center - Woofer - Side Left - Side Right Limits: Playback 0 - 197 Mono: Front Left: Playback 90 [46%] [-20.06dB] [on] Front Right: Playback 90 [46%] [-20.06dB] [on] Rear Left: Playback 90 [46%] [-20.06dB] [on] Rear Right: Playback 90 [46%] [-20.06dB] [on] Front Center: Playback 90 [46%] [-20.06dB] [on] Woofer: Playback 90 [46%] [-20.06dB] [on] Side Left: Playback 90 [46%] [-20.06dB] [on] Side Right: Playback 90 [46%] [-20.06dB] [on] Simple mixer control 'PCM',0 Capabilities: cvolume cswitch cswitch-joined penum Capture channels: Front Left - Front Right Limits: Capture 0 - 6928 Front Left: Capture 4096 [59%] [0.01dB] [on] Front Right: Capture 4096 [59%] [0.01dB] [on] Simple mixer control 'PCM Capture Source',0 Capabilities: enum Items: 'Mic' 'Line' 'IEC958 In' 'Mixer' Item0: 'IEC958 In' Simple mixer control 'Line',0 Capabilities: pvolume cvolume pswitch pswitch-joined cswitch cswitch-joined penum Playback channels: Front Left - Front Right Capture channels: Front Left - Front Right Limits: Playback 0 - 8065 Capture 0 - 6928 Front Left: Playback 6144 [76%] [0.01dB] [off] Capture 0 [0%] [-16.00dB] [off] Front Right: Playback 6144 [76%] [0.01dB] [off] Capture 0 [0%] [-16.00dB] [off] Simple mixer control 'Mic',0 Capabilities: pvolume cvolume pswitch pswitch-joined cswitch cswitch-joined penum Playback channels: Front Left - Front Right Capture channels: Front Left - Front Right Limits: Playback 0 - 8065 Capture 0 - 6928 Front Left: Playback 6153 [76%] [0.03dB] [off] Capture 4096 [59%] [0.01dB] [on] Front Right: Playback 6153 [76%] [0.03dB] [off] Capture 4096 [59%] [0.01dB] [on] Simple mixer control 'IEC958 In',0 Capabilities: cswitch cswitch-joined penum Capture channels: Mono Mono: Capture [on] The two controls related to SPDIF In are 'PCM Capture Source' and 'IEC958 In'. I'm not sure what they mean. The latter seems to enable/disable the mix of the SPDIF In into capture stream (i.e., Input). For the first one I have no idea. I will try to experiment with different values of the controls, but unfortunately for the following two weeks I will not have any SPDIF signal source to play with. Best regards, Denis Shulyaka ------------------------------------------------------------------------------ CenturyLink Cloud: The Leader in Enterprise Cloud Services. Learn Why More Businesses Are Choosing CenturyLink Cloud For Critical Workloads, Development Environments & Everything In Between. Get a Quote or Start a Free Trial Today. http://pubads.g.doubleclick.net/gampad/clk?id=119420431&iu=/4140/ostg.clktrk _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
