################################################################################
# ... output of aplay -l
# LibreELEC release: S905.arm-8.2.3.1
# 
################################################################################
**** List of PLAYBACK Hardware Devices ****
card 0: AMLM8AUDIO [AML-M8AUDIO], device 0: I2S.40 T9015-audio-hifi-0 []
  Subdevices: 0/1
  Subdevice #0: subdevice #0
card 0: AMLM8AUDIO [AML-M8AUDIO], device 1: SPDIF.41 dit-hifi-1 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: AMLM8AUDIO [AML-M8AUDIO], device 2: PCM.42 pcm2bt-pcm-2 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0

################################################################################
# ... output of aplay -L
# LibreELEC release: S905.arm-8.2.3.1
# 
################################################################################
null
    Discard all samples (playback) or generate zero samples (capture)
default:CARD=AMLM8AUDIO
    AML-M8AUDIO, 
    Default Audio Device
sysdefault:CARD=AMLM8AUDIO
    AML-M8AUDIO, 
    Default Audio Device
hdmi:CARD=AMLM8AUDIO,DEV=0
    AML-M8AUDIO, 
    HDMI Audio Output

################################################################################
# ... output of amixer
# LibreELEC release: S905.arm-8.2.3.1
# 
################################################################################
Simple mixer control 'PCM',0
  Capabilities: pvolume
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 255
  Mono:
  Front Left: Playback 255 [100%] [0.00dB]
  Front Right: Playback 255 [100%] [0.00dB]
Simple mixer control 'Lineout left N switch',0
  Capabilities: enum
  Items: 'None' 'LOLN_SEL_DACL_INV' 'LOLN_SEL_DACL'
  Item0: 'LOLN_SEL_DACL_INV'
Simple mixer control 'Lineout left P switch',0
  Capabilities: enum
  Items: 'None' 'LOLP_SEL_DACL' 'LOLP_SEL_DACL_INV'
  Item0: 'LOLP_SEL_DACL'
Simple mixer control 'Lineout right N switch',0
  Capabilities: enum
  Items: 'None' 'LORN_SEL_DACR_INV' 'LORN_SEL_DACR'
  Item0: 'LORN_SEL_DACR_INV'
Simple mixer control 'Lineout right P switch',0
  Capabilities: enum
  Items: 'None' 'LORP_SEL_DACR' 'LORP_SEL_DACR_INV'
  Item0: 'LORP_SEL_DACR'
Simple mixer control 'Audio i2s mute',0
  Capabilities: pswitch pswitch-joined
  Playback channels: Mono
  Mono: Playback [off]
Simple mixer control 'Audio spdif mute',0
  Capabilities: pswitch pswitch-joined
  Playback channels: Mono
  Mono: Playback [off]
Simple mixer control 'DAC Digital',0
  Capabilities: pvolume
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 255
  Mono:
  Front Left: Playback 251 [98%] [-11.25dB]
  Front Right: Playback 251 [98%] [-11.25dB]
Simple mixer control 'DAC Extra Digital Gain',0
  Capabilities: enum
  Items: '0dB' '6dB' '12dB' '18dB'
  Item0: '0dB'
Simple mixer control 'Ext Spk',0
  Capabilities: pswitch pswitch-joined
  Playback channels: Mono
  Mono: Playback [off]
Simple mixer control 'Output Swap',0
  Capabilities: enum
  Items: 'L/R' 'L/L' 'R/R' 'R/L'
  Item0: 'R/L'