There is no volume control for headphone as node 0x21 headphone is connected to 0x0c (Speaker Playback Volume)
Simple mixer control 'Headphone',0
Capabilities: pswitch penum
Playback channels: Front Left - Front Right
Mono:
Front Left: Playback [on]
Front Right: Playback [on]
Simple mixer control 'Speaker',0
Capabilities: pvolume pswitch penum
Playback channels: Front Left - Front Right
Limits: Playback 0 - 87
Mono:
Front Left: Playback 87 [100%] [0.00dB] [off]
Front Right: Playback 87 [100%] [0.00dB] [off]
Simple mixer control 'Bass Speaker',0
Capabilities: pvolume pswitch penum
Playback channels: Front Left - Front Right
Limits: Playback 0 - 87
Mono:
Front Left: Playback 0 [0%] [-65.25dB] [on]
Front Right: Playback 0 [0%] [-65.25dB] [on]
There is no volume control for headphone as node 0x21 headphone is connected to 0x0c (Speaker Playback Volume)
Simple mixer control 'Headphone',0
Capabilities: pswitch penum
Playback channels: Front Left - Front Right
Mono:
Front Left: Playback [on]
Front Right: Playback [on]
Simple mixer control 'Speaker',0
Capabilities: pvolume pswitch penum
Playback channels: Front Left - Front Right
Limits: Playback 0 - 87
Mono:
Front Left: Playback 87 [100%] [0.00dB] [off]
Front Right: Playback 87 [100%] [0.00dB] [off]
Simple mixer control 'Bass Speaker',0
Capabilities: pvolume pswitch penum
Playback channels: Front Left - Front Right
Limits: Playback 0 - 87
Mono:
Front Left: Playback 0 [0%] [-65.25dB] [on]
Front Right: Playback 0 [0%] [-65.25dB] [on]