Card sysdefault:0 'Headphones'/'bcm2835 Headphones' Mixer name : 'Broadcom Mixer' Components : '' Controls : 2 Simple ctrls : 1 Simple mixer control 'PCM',0 Capabilities: pvolume pvolume-joined pswitch pswitch-joined Playback channels: Mono Limits: Playback -10239 - 400 Mono: Playback -1988 [78%] [-19.88dB] [on] Card sysdefault:1 'Device'/'GeneralPlus USB Audio Device at usb-3f980000.usb-1.2, full speed' Mixer name : 'USB Mixer' Components : 'USB1b3f:2008' Controls : 9 Simple ctrls : 3 Simple mixer control 'Speaker',0 Capabilities: pvolume pswitch pswitch-joined Playback channels: Front Left - Front Right Limits: Playback 0 - 30 Mono: Front Left: Playback 15 [50%] [-22.50dB] [on] Front Right: Playback 15 [50%] [-22.50dB] [on] Simple mixer control 'Mic',0 Capabilities: pvolume pvolume-joined cvolume cvolume-joined pswitch pswitch-joined cswitch cswitch-joined Playback channels: Mono Capture channels: Mono Limits: Playback 0 - 14 Capture 0 - 30 Mono: Playback 1 [7%] [-10.50dB] [off] Capture 30 [100%] [33.00dB] [on] Simple mixer control 'Auto Gain Control',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [off] Card sysdefault:2 'vc4hdmi'/'vc4-hdmi' Mixer name : '' Components : '' Controls : 5 Simple ctrls : 0