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[root@rk3288:/]# amixer scontents
Simple mixer control 'PCM',0
Capabilities: pvolume
Playback channels: Front Left - Front Right
Limits: Playback 0 - 175
Mono:
Front Left: Playback 127 [73%] [0.00dB]
Front Right: Playback 127 [73%] [0.00dB]
Simple mixer control 'Mic PGA',0
Capabilities: pswitch
Playback channels: Front Left - Front Right
Mono:
Front Left: Playback [off]
Front Right: Playback [off]
Simple mixer control 'ADC Level',0
Capabilities: volume
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: 0 - 64
Front Left: 24 [38%] [0.00dB]
Front Right: 24 [38%] [0.00dB]
Simple mixer control 'ADCFGA Left Mute',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [on]
Simple mixer control 'ADCFGA Right Mute',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [on]
Simple mixer control 'AGC Attack Time',0
Capabilities: volume
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: 0 - 31
Front Left: 0 [0%]
Front Right: 0 [0%]
Simple mixer control 'AGC Decay Time',0
Capabilities: volume
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: 0 - 31
Front Left: 0 [0%]
Front Right: 0 [0%]
Simple mixer control 'AGC Gain Hysteresis',0
Capabilities: volume
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: 0 - 3
Front Left: 0 [0%]
Front Right: 0 [0%]
Simple mixer control 'AGC Hysteresis',0
Capabilities: volume
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: 0 - 3
Front Left: 0 [0%]
Front Right: 0 [0%]
Simple mixer control 'AGC Left',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'AGC Max PGA',0
Capabilities: volume
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: 0 - 127
Front Left: 127 [100%]
Front Right: 127 [100%]
Simple mixer control 'AGC Noise Debounce',0
Capabilities: volume
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: 0 - 31
Front Left: 0 [0%]
Front Right: 0 [0%]
Simple mixer control 'AGC Noise Threshold',0
Capabilities: volume
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: 0 - 31
Front Left: 0 [0%]
Front Right: 0 [0%]
Simple mixer control 'AGC Right',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'AGC Signal Debounce',0
Capabilities: volume
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: 0 - 15
Front Left: 0 [0%]
Front Right: 0 [0%]
Simple mixer control 'AGC Target Level',0
Capabilities: volume
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: 0 - 7
Front Left: 0 [0%]
Front Right: 0 [0%]
Simple mixer control 'HP DAC',0
Capabilities: pswitch
Playback channels: Front Left - Front Right
Mono:
Front Left: Playback [off]
Front Right: Playback [off]
Simple mixer control 'HP Driver Gain',0
Capabilities: volume
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: 0 - 35
Front Left: 6 [17%] [0.00dB]
Front Right: 6 [17%] [0.00dB]
Simple mixer control 'HPL Output Mixer IN1_L',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'HPL Output Mixer L_DAC',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'HPR Output Mixer IN1_R',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'HPR Output Mixer R_DAC',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'LO DAC',0
Capabilities: pswitch
Playback channels: Front Left - Front Right
Mono:
Front Left: Playback [off]
Front Right: Playback [off]
Simple mixer control 'LO Driver Gain',0
Capabilities: volume
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: 0 - 35
Front Left: 6 [17%] [0.00dB]
Front Right: 6 [17%] [0.00dB]
Simple mixer control 'LOL Output Mixer L_DAC',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'LOR Output Mixer R_DAC',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'Left Input Mixer IN1_L P',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'Left Input Mixer IN2_L P',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'Left Input Mixer IN3_L P',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'PGA Level',0
Capabilities: volume
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: 0 - 95
Front Left: 0 [0%] [0.00dB]
Front Right: 0 [0%] [0.00dB]
Simple mixer control 'Right Input Mixer IN1_R P',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'Right Input Mixer IN2_R P',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'Right Input Mixer IN3_R P',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
[root@rk3288:/]#