Card sysdefault:0 'Loopback'/'Loopback 1' Mixer name : 'Loopback Mixer' Components : '' Controls : 113 Simple ctrls : 1 Simple mixer control 'PCM',0 Capabilities: pvolume Playback channels: Front Left - Front Right Limits: Playback 0 - 255 Mono: Front Left: Playback 255 [100%] [0.00dB] Front Right: Playback 255 [100%] [0.00dB]