Alsa defaults SL-8268

Since we'll want to mix the radio and the navigation, we'll probably be using alsa for that:

# alsa_amixer
Simple mixer control 'Master',0
 Capabilities: pvolume
 Playback channels: Front Left - Front Right
 Limits: Playback 0 - 127
 Mono:
 Front Left: Playback 118 [93%] [-3.00dB]
 Front Right: Playback 118 [93%] [-3.00dB]
Simple mixer control 'Master Playback ZC',0
 Capabilities: pswitch
 Playback channels: Front Left - Front Right
 Mono:
 Front Left: Playback [off]
 Front Right: Playback [off]
Simple mixer control 'Sidetone',0
 Capabilities: pvolume pvolume-joined
 Playback channels: Mono
 Limits: Playback 0 - 3
 Mono: Playback 1 [33%] [-12.00dB]
Simple mixer control 'Line',0
 Capabilities: cswitch
 Capture channels: Front Left - Front Right
 Front Left: Capture [off]
 Front Right: Capture [off]
Simple mixer control 'Mic',0
 Capabilities: cswitch cswitch-joined
 Capture channels: Mono
 Mono: Capture [on]
Simple mixer control 'Mic Boost (+20dB)',0
 Capabilities: pswitch pswitch-joined
 Playback channels: Mono
 Mono: Playback [off]
Simple mixer control 'Playback De-emphasis',0
 Capabilities: enum
 Items: 'None' '32Khz' '44.1Khz' '48Khz'
 Item0: 'None'
Simple mixer control 'Capture',0
 Capabilities: cvolume
 Capture channels: Front Left - Front Right
 Limits: Capture 0 - 31
 Front Left: Capture 31 [100%] [12.00dB]
 Front Right: Capture 31 [100%] [12.00dB]
Simple mixer control 'ADC High Pass Filter',0
 Capabilities: pswitch pswitch-joined
 Playback channels: Mono
 Mono: Playback [on]
Simple mixer control 'Input Mux',0
 Capabilities: enum
 Items: 'Line In' 'Mic'
 Item0: 'Mic'
Simple mixer control 'Jack Function',0
 Capabilities: enum
 Items: 'Headphone' 'Mic' 'Line' 'Headset' 'Off'
 Item0: 'Headphone'
Simple mixer control 'Output Mixer HiFi',0
 Capabilities: pswitch pswitch-joined
 Playback channels: Mono
 Mono: Playback [on]
Simple mixer control 'Output Mixer Line Bypass',0
 Capabilities: pswitch pswitch-joined
 Playback channels: Mono
 Mono: Playback [off]
Simple mixer control 'Output Mixer Mic Sidetone',0
 Capabilities: pswitch pswitch-joined
 Playback channels: Mono
 Mono: Playback [off]
Simple mixer control 'Speaker Function',0
 Capabilities: enum
 Items: 'On' 'Off'
 Item0: 'On'
Simple mixer control 'Store DC Offset',0
 Capabilities: pswitch pswitch-joined
 Playback channels: Mono
 Mono: Playback [off]
#

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