Thank you for weighing in. I will explore the post you cite and in the meantime:
[jake@usa ~]$ amixer -c0
Simple mixer control 'Headphone',0
Capabilities: pvolume pswitch pswitch-joined
Playback channels: Front Left - Front Right
Limits: Playback 0 - 3
Mono:
Front Left: Playback 0 [0%] [-48.00dB] [off]
Front Right: Playback 0 [0%] [-48.00dB] [off]
Simple mixer control 'Headphone Mixer',0
Capabilities: volume
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: 0 - 11
Front Left: 3 [27%] [-7.50dB]
Front Right: 3 [27%] [-7.50dB]
Simple mixer control 'Speaker',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'Mic Boost',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [on]
Simple mixer control 'IEC958',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'IEC958',1
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [on]
Simple mixer control 'IEC958',2
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [on]
Simple mixer control 'Playback Polarity',0
Capabilities: enum
Items: 'Normal' 'R Invert' 'L Invert' 'L + R Invert'
Item0: 'Normal'
Simple mixer control 'Capture Polarity',0
Capabilities: enum
Items: 'Normal' 'Invert'
Item0: 'Normal'
Simple mixer control 'ADC',0
Capabilities: cvolume cvolume-joined
Capture channels: Mono
Limits: Capture 0 - 192
Mono: Capture 115 [60%] [-38.50dB]
Simple mixer control 'ADC Double Fs',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'ADC PGA Gain',0
Capabilities: volume volume-joined
Playback channels: Mono
Capture channels: Mono
Limits: 0 - 10
Mono: 0 [0%] [-3.50dB]
Simple mixer control 'ADC Soft Ramp',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [on]
Simple mixer control 'ALC',0
Capabilities: cswitch cswitch-joined
Capture channels: Mono
Mono: Capture [off]
Simple mixer control 'ALC Capture Attack Time',0
Capabilities: volume volume-joined
Playback channels: Mono
Capture channels: Mono
Limits: 0 - 10
Mono: 2 [20%]
Simple mixer control 'ALC Capture Decay Time',0
Capabilities: volume volume-joined
Playback channels: Mono
Capture channels: Mono
Limits: 0 - 10
Mono: 3 [30%]
Simple mixer control 'ALC Capture Hold Time',0
Capabilities: volume volume-joined
Playback channels: Mono
Capture channels: Mono
Limits: 0 - 10
Mono: 0 [0%]
Simple mixer control 'ALC Capture Max',0
Capabilities: volume volume-joined
Playback channels: Mono
Capture channels: Mono
Limits: 0 - 28
Mono: 28 [100%] [35.50dB]
Simple mixer control 'ALC Capture Min',0
Capabilities: volume volume-joined
Playback channels: Mono
Capture channels: Mono
Limits: 0 - 28
Mono: 0 [0%] [-12.00dB]
Simple mixer control 'ALC Capture Noise Gate',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'ALC Capture Noise Gate Threshold',0
Capabilities: volume volume-joined
Playback channels: Mono
Capture channels: Mono
Limits: 0 - 31
Mono: 0 [0%]
Simple mixer control 'ALC Capture Noise Gate Type',0
Capabilities: enum
Items: 'Constant PGA Gain' 'Mute ADC Output'
Item0: 'Constant PGA Gain'
Simple mixer control 'ALC Capture Target',0
Capabilities: volume volume-joined
Playback channels: Mono
Capture channels: Mono
Limits: 0 - 10
Mono: 11 [110%] [0.00dB]
Simple mixer control 'DAC',0
Capabilities: pvolume
Playback channels: Front Left - Front Right
Limits: Playback 0 - 192
Mono:
Front Left: Playback 115 [60%] [-38.50dB]
Front Right: Playback 115 [60%] [-38.50dB]
Simple mixer control 'DAC Double Fs',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'DAC Mono Mix',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'DAC Notch Filter',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'DAC Soft Ramp',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'DAC Soft Ramp Rate',0
Capabilities: volume volume-joined
Playback channels: Mono
Capture channels: Mono
Limits: 0 - 4
Mono: 4 [100%]
Simple mixer control 'DAC Source Mux',0
Capabilities: enum
Items: 'LDATA TO LDAC, RDATA TO RDAC' 'LDATA TO LDAC, LDATA TO RDAC' 'RDATA TO LDAC, RDATA TO RDAC' 'RDATA TO LDAC, LDATA TO RDAC'
Item0: 'LDATA TO LDAC, RDATA TO RDAC'
Simple mixer control 'DAC Stereo Enhancement',0
Capabilities: volume volume-joined
Playback channels: Mono
Capture channels: Mono
Limits: 0 - 7
Mono: 0 [0%]
Simple mixer control 'Differential Mux',0
Capabilities: enum
Items: 'lin1-rin1' 'lin2-rin2' 'lin1-rin1 with 20db Boost' 'lin2-rin2 with 20db Boost'
Item0: 'lin1-rin1'
Simple mixer control 'Digital Mic Mux',0
Capabilities: enum
Items: 'dmic disable' 'dmic data at high level' 'dmic data at low level'
Item0: 'dmic disable'
Simple mixer control 'Headset Mic',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'Internal Mic',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [on]
Simple mixer control 'Left Headphone Mixer LLIN',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'Left Headphone Mixer Left DAC',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [on]
Simple mixer control 'Left Headphone Mux',0
Capabilities: enum
Items: 'lin1-rin1' 'lin2-rin2' 'lin-rin with Boost' 'lin-rin with Boost and PGA'
Item0: 'lin1-rin1'
Simple mixer control 'PGA1.0 1 Master',0
Capabilities: pvolume
Playback channels: Front Left - Front Right
Limits: Playback 0 - 32
Mono:
Front Left: Playback 32 [100%] [0.00dB]
Front Right: Playback 32 [100%] [0.00dB]
Simple mixer control 'PGA2.0 2 PCM 0',0
Capabilities: cvolume
Capture channels: Front Left - Front Right
Limits: Capture 0 - 40
Front Left: Capture 32 [80%] [0.00dB]
Front Right: Capture 32 [80%] [0.00dB]
Simple mixer control 'PGA5.0 5 Master',0
Capabilities: pvolume
Playback channels: Front Left - Front Right
Limits: Playback 0 - 32
Mono:
Front Left: Playback 32 [100%] [0.00dB]
Front Right: Playback 32 [100%] [0.00dB]
Simple mixer control 'PGA6.0 6 Master',0
Capabilities: pvolume
Playback channels: Front Left - Front Right
Limits: Playback 0 - 32
Mono:
Front Left: Playback 32 [100%] [0.00dB]
Front Right: Playback 32 [100%] [0.00dB]
Simple mixer control 'PGA7.0 7 Master',0
Capabilities: pvolume
Playback channels: Front Left - Front Right
Limits: Playback 0 - 32
Mono:
Front Left: Playback 32 [100%] [0.00dB]
Front Right: Playback 32 [100%] [0.00dB]
Simple mixer control 'Right Headphone Mixer RLIN',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'Right Headphone Mixer Right DAC',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [on]
Simple mixer control 'Right Headphone Mux',0
Capabilities: enum
Items: 'lin1-rin1' 'lin2-rin2' 'lin-rin with Boost' 'lin-rin with Boost and PGA'
Item0: 'lin1-rin1'