Card sysdefault:1 'CODEC'/'Burr-Brown from TI USB Audio CODEC at usb-0000:00:14.0-5, full speed' Mixer name : 'USB Mixer' Components : 'USB08bb:2902' Controls : 4 Simple ctrls : 1 Simple mixer control 'PCM',0 Capabilities: pvolume pswitch pswitch-joined Playback channels: Front Left - Front Right Limits: Playback 0 - 128 Mono: Front Left: Playback 97 [76%] [-31.00dB] [on] Front Right: Playback 97 [76%] [-31.00dB] [on] Card sysdefault:2 'K3'/'FiiO K3 at usb-0000:00:14.0-7, high speed' Mixer name : 'USB Mixer' Components : 'USB2972:0047' Controls : 6 Simple ctrls : 2 Simple mixer control 'K3 ',0 Capabilities: pvolume pswitch Playback channels: Front Left - Front Right Limits: Playback 0 - 127 Mono: Front Left: Playback 127 [100%] [0.00dB] [on] Front Right: Playback 127 [100%] [0.00dB] [on] Simple mixer control 'K3 ',1 Capabilities: pvolume pvolume-joined pswitch pswitch-joined Playback channels: Mono Limits: Playback 0 - 127 Mono: Playback 127 [100%] [0.00dB] [on]