pi@raspberrypi:~ $ cat /proc/asound/pcm
00-00: MAI PCM i2s-hifi-0 : MAI PCM i2s-hifi-0 : playback 1
01-00: MAI PCM i2s-hifi-0 : MAI PCM i2s-hifi-0 : playback 1
02-00: 1f000a0000.i2s-tac5x1x-hifi tac5x1x-hifi-0 : 1f000a0000.i2s-tac5x1x-hifi tac5x1x-hifi-0 : playback 1 : capture 1

pi@raspberrypi:~ $ cat /proc/asound/cards
 0 [vc4hdmi0       ]: vc4-hdmi - vc4-hdmi-0
                      vc4-hdmi-0
 1 [vc4hdmi1       ]: vc4-hdmi - vc4-hdmi-1
                      vc4-hdmi-1
 2 [tac5x1xsoundcar]: simple-card - tac5x1x-soundcard
                      tac5x1x-soundcard

pi@raspberrypi:~ $ amixer contents -c 2
numid=19,iface=MIXER,name='ADC1 Audio BW'
  ; type=ENUMERATED,access=rw------,values=1,items=2
  ; Item #0 'Audio BW 24-kHz'
  ; Item #1 'Wide BW 96-kHz'
  : values=0
numid=1,iface=MIXER,name='ADC1 Common-mode Tolerance'
  ; type=ENUMERATED,access=rw------,values=1,items=3
  ; Item #0 'AC Coupled with 100mVpp'
  ; Item #1 'AC/DC Coupled with 1Vpp'
  ; Item #2 'AC/DC Coupled with Rail-to-rail'
  : values=1
numid=28,iface=MIXER,name='ADC1 Config'
  ; type=ENUMERATED,access=rw------,values=1,items=4
  ; Item #0 'Differential'
  ; Item #1 'Single-ended'
  ; Item #2 'Single-ended mux INxP'
  ; Item #3 'Single-ended mux INxM'
  : values=0
numid=20,iface=MIXER,name='ADC1 Digital Capture Volume'
  ; type=INTEGER,access=rw---R--,values=1,min=0,max=255,step=0
  : values=161
  | dBscale-min=-80.00dB,step=0.50dB,mute=0
numid=21,iface=MIXER,name='ADC1 Fine Capture Volume'
  ; type=INTEGER,access=rw---R--,values=1,min=0,max=255,step=0
  : values=128
  | dBminmax-min=-0.80dB,max=0.70dB
numid=27,iface=MIXER,name='ADC1 Full-Scale'
  ; type=ENUMERATED,access=rw------,values=1,items=2
  ; Item #0 '1/2/5-VRMS'
  ; Item #1 '2/4/10-VRMS'
  : values=0
numid=2,iface=MIXER,name='ADC1 Impedance Select'
  ; type=ENUMERATED,access=rw------,values=1,items=3
  ; Item #0 '5 kOhm'
  ; Item #1 '10 kOhm'
  ; Item #2 '40 kOhm'
  : values=0
numid=22,iface=MIXER,name='ADC1 Phase Capture Volume'
  ; type=INTEGER,access=rw------,values=1,min=0,max=63,step=0
  : values=0
numid=9,iface=MIXER,name='ADC2 Audio BW'
  ; type=ENUMERATED,access=rw------,values=1,items=2
  ; Item #0 'Audio BW 24-kHz'
  ; Item #1 'Wide BW 96-kHz'
  : values=0
numid=3,iface=MIXER,name='ADC2 Common-mode Tolerance'
  ; type=ENUMERATED,access=rw------,values=1,items=3
  ; Item #0 'AC Coupled with 100mVpp'
  ; Item #1 'AC/DC Coupled with 1Vpp'
  ; Item #2 'AC/DC Coupled with Rail-to-rail'
  : values=1
numid=35,iface=MIXER,name='ADC2 Config'
  ; type=ENUMERATED,access=rw------,values=1,items=4
  ; Item #0 'Differential'
  ; Item #1 'Single-ended'
  ; Item #2 'Single-ended mux INxP'
  ; Item #3 'Single-ended mux INxM'
  : values=0
numid=10,iface=MIXER,name='ADC2 Digital Capture Volume'
  ; type=INTEGER,access=rw---R--,values=1,min=0,max=255,step=0
  : values=255
  | dBscale-min=-80.00dB,step=0.50dB,mute=0
numid=11,iface=MIXER,name='ADC2 Fine Capture Volume'
  ; type=INTEGER,access=rw---R--,values=1,min=0,max=255,step=0
  : values=128
  | dBminmax-min=-0.80dB,max=0.70dB
numid=34,iface=MIXER,name='ADC2 Full-Scale'
  ; type=ENUMERATED,access=rw------,values=1,items=2
  ; Item #0 '1/2/5-VRMS'
  ; Item #1 '2/4/10-VRMS'
  : values=1
numid=4,iface=MIXER,name='ADC2 Impedance Select'
  ; type=ENUMERATED,access=rw------,values=1,items=3
  ; Item #0 '5 kOhm'
  ; Item #1 '10 kOhm'
  ; Item #2 '40 kOhm'
  : values=0
numid=12,iface=MIXER,name='ADC2 Phase Capture Volume'
  ; type=INTEGER,access=rw------,values=1,min=0,max=63,step=0
  : values=0
numid=14,iface=MIXER,name='Playback Decimation Filter'
  ; type=ENUMERATED,access=rw------,values=1,items=3
  ; Item #0 'Linear Phase'
  ; Item #1 'Low Latency'
  ; Item #2 'Ultra-low Latency'
  : values=0
numid=26,iface=MIXER,name='ASI_RX_CH1_EN Switch'
  ; type=BOOLEAN,access=rw------,values=1
  : values=on
numid=33,iface=MIXER,name='ASI_RX_CH2_EN Switch'
  ; type=BOOLEAN,access=rw------,values=1
  : values=on
numid=29,iface=MIXER,name='ASI_TX_CH1_EN Switch'
  ; type=BOOLEAN,access=rw------,values=1
  : values=on
numid=36,iface=MIXER,name='ASI_TX_CH2_EN Switch'
  ; type=BOOLEAN,access=rw------,values=1
  : values=on
numid=15,iface=MIXER,name='DAC1 Audio BW'
  ; type=ENUMERATED,access=rw------,values=1,items=2
  ; Item #0 'Audio BW 24-kHz'
  ; Item #1 'Wide BW 96-kHz'
  : values=0
numid=16,iface=MIXER,name='DAC1 Digital Playback Volume'
  ; type=INTEGER,access=rw---R--,values=2,min=0,max=255,step=0
  : values=255,255
  | dBscale-min=-100.00dB,step=0.50dB,mute=0
numid=17,iface=MIXER,name='DAC1 Gain Calibration Playback Volume'
  ; type=INTEGER,access=rw---R--,values=2,min=0,max=15,step=0
  : values=8,8
  | dBminmax-min=-0.80dB,max=0.70dB
numid=8,iface=MIXER,name='DAC2 Audio BW'
  ; type=ENUMERATED,access=rw------,values=1,items=2
  ; Item #0 'Audio BW 24-kHz'
  ; Item #1 'Wide BW 96-kHz'
  : values=1
numid=6,iface=MIXER,name='DAC2 Digital Playback Volume'
  ; type=INTEGER,access=rw---R--,values=2,min=0,max=255,step=0
  : values=255,255
  | dBscale-min=-100.00dB,step=0.50dB,mute=0
numid=7,iface=MIXER,name='DAC2 Gain Calibration Playback Volume'
  ; type=INTEGER,access=rw---R--,values=2,min=0,max=15,step=0
  : values=15,15
  | dBminmax-min=-0.80dB,max=0.70dB
numid=37,iface=MIXER,name='IN1 Source Mux'
  ; type=ENUMERATED,access=rw------,values=1,items=2
  ; Item #0 'Analog'
  ; Item #1 'PDM'
  : values=0
numid=38,iface=MIXER,name='IN2 Source Mux'
  ; type=ENUMERATED,access=rw------,values=1,items=2
  ; Item #0 'Analog'
  ; Item #1 'PDM'
  : values=0
numid=13,iface=MIXER,name='OUT1 Analog Level Playback Volume'
  ; type=INTEGER,access=rw---R--,values=2,min=0,max=6,step=0
  : values=6,6
  | dBscale-min=-12.00dB,step=6.00dB,mute=0
numid=24,iface=MIXER,name='OUT1x Config'
  ; type=ENUMERATED,access=rw------,values=1,items=7
  ; Item #0 'Differential'
  ; Item #1 'Stereo Single-ended'
  ; Item #2 'Mono Single-ended at OUTxP only'
  ; Item #3 'Mono Single-ended at OUTxM only'
  ; Item #4 'Pseudo differential with OUTxM as VCOM'
  ; Item #5 'Pseudo differential with OUTxM as external sensing'
  ; Item #6 'Pseudo differential with OUTxP as VCOM'
  : values=0
numid=25,iface=MIXER,name='OUT1x Driver'
  ; type=ENUMERATED,access=rw------,values=1,items=4
  ; Item #0 'Line-out'
  ; Item #1 'Headphone'
  ; Item #2 '4 ohm'
  ; Item #3 'FD Receiver/Debug'
  : values=0
numid=23,iface=MIXER,name='OUT1x Source'
  ; type=ENUMERATED,access=rw------,values=1,items=6
  ; Item #0 'Disabled'
  ; Item #1 'DAC Input'
  ; Item #2 'Analog Bypass'
  ; Item #3 'DAC + Analog Bypass Mix'
  ; Item #4 'DAC -> OUTxP, INxP -> OUTxM'
  ; Item #5 'INxM -> OUTxP, DAC -> OUTxM'
  : values=1
numid=5,iface=MIXER,name='OUT2 Analog Level Playback Volume'
  ; type=INTEGER,access=rw---R--,values=2,min=0,max=6,step=0
  : values=6,6
  | dBscale-min=-12.00dB,step=6.00dB,mute=0
numid=31,iface=MIXER,name='OUT2x Config'
  ; type=ENUMERATED,access=rw------,values=1,items=7
  ; Item #0 'Differential'
  ; Item #1 'Stereo Single-ended'
  ; Item #2 'Mono Single-ended at OUTxP only'
  ; Item #3 'Mono Single-ended at OUTxM only'
  ; Item #4 'Pseudo differential with OUTxM as VCOM'
  ; Item #5 'Pseudo differential with OUTxM as external sensing'
  ; Item #6 'Pseudo differential with OUTxP as VCOM'
  : values=0
numid=32,iface=MIXER,name='OUT2x Driver'
  ; type=ENUMERATED,access=rw------,values=1,items=4
  ; Item #0 'Line-out'
  ; Item #1 'Headphone'
  ; Item #2 '4 ohm'
  ; Item #3 'FD Receiver/Debug'
  : values=0
numid=30,iface=MIXER,name='OUT2x Source'
  ; type=ENUMERATED,access=rw------,values=1,items=6
  ; Item #0 'Disabled'
  ; Item #1 'DAC Input'
  ; Item #2 'Analog Bypass'
  ; Item #3 'DAC + Analog Bypass Mix'
  ; Item #4 'DAC -> OUTxP, INxP -> OUTxM'
  ; Item #5 'INxM -> OUTxP, DAC -> OUTxM'
  : values=1
numid=18,iface=MIXER,name='Record Decimation Filter'
  ; type=ENUMERATED,access=rw------,values=1,items=3
  ; Item #0 'Linear Phase'
  ; Item #1 'Low Latency'
  ; Item #2 'Ultra-low Latency'
  : values=0

pi@raspberrypi:~ $ aplay -L
null
    Discard all samples (playback) or generate zero samples (capture)
default
    Playback/recording through the PulseAudio sound server
lavrate
    Rate Converter Plugin Using Libav/FFmpeg Library
samplerate
    Rate Converter Plugin Using Samplerate Library
speexrate
    Rate Converter Plugin Using Speex Resampler
jack
    JACK Audio Connection Kit
oss
    Open Sound System
pulse
    PulseAudio Sound Server
speex
    Plugin using Speex DSP (resample, agc, denoise, echo, dereverb)
upmix
    Plugin for channel upmix (4,6,8)
vdownmix
    Plugin for channel downmix (stereo) with a simple spacialization
hw:CARD=vc4hdmi0,DEV=0
    vc4-hdmi-0, MAI PCM i2s-hifi-0
    Direct hardware device without any conversions
plughw:CARD=vc4hdmi0,DEV=0
    vc4-hdmi-0, MAI PCM i2s-hifi-0
    Hardware device with all software conversions
sysdefault:CARD=vc4hdmi0
    vc4-hdmi-0, MAI PCM i2s-hifi-0
    Default Audio Device
hdmi:CARD=vc4hdmi0,DEV=0
    vc4-hdmi-0, MAI PCM i2s-hifi-0
    HDMI Audio Output
dmix:CARD=vc4hdmi0,DEV=0
    vc4-hdmi-0, MAI PCM i2s-hifi-0
    Direct sample mixing device
usbstream:CARD=vc4hdmi0
    vc4-hdmi-0
    USB Stream Output
hw:CARD=vc4hdmi1,DEV=0
    vc4-hdmi-1, MAI PCM i2s-hifi-0
    Direct hardware device without any conversions
plughw:CARD=vc4hdmi1,DEV=0
    vc4-hdmi-1, MAI PCM i2s-hifi-0
    Hardware device with all software conversions
sysdefault:CARD=vc4hdmi1
    vc4-hdmi-1, MAI PCM i2s-hifi-0
    Default Audio Device
hdmi:CARD=vc4hdmi1,DEV=0
    vc4-hdmi-1, MAI PCM i2s-hifi-0
    HDMI Audio Output
dmix:CARD=vc4hdmi1,DEV=0
    vc4-hdmi-1, MAI PCM i2s-hifi-0
    Direct sample mixing device
usbstream:CARD=vc4hdmi1
    vc4-hdmi-1
    USB Stream Output
hw:CARD=tac5x1xsoundcar,DEV=0
    tac5x1x-soundcard, 1f000a0000.i2s-tac5x1x-hifi tac5x1x-hifi-0
    Direct hardware device without any conversions
plughw:CARD=tac5x1xsoundcar,DEV=0
    tac5x1x-soundcard, 1f000a0000.i2s-tac5x1x-hifi tac5x1x-hifi-0
    Hardware device with all software conversions
sysdefault:CARD=tac5x1xsoundcar
    tac5x1x-soundcard, 1f000a0000.i2s-tac5x1x-hifi tac5x1x-hifi-0
    Default Audio Device
dmix:CARD=tac5x1xsoundcar,DEV=0
    tac5x1x-soundcard, 1f000a0000.i2s-tac5x1x-hifi tac5x1x-hifi-0
    Direct sample mixing device
usbstream:CARD=tac5x1xsoundcar
    tac5x1x-soundcard
    USB Stream Output

pi@raspberrypi:~ $ arecord -L
null
    Discard all samples (playback) or generate zero samples (capture)
default
    Playback/recording through the PulseAudio sound server
lavrate
    Rate Converter Plugin Using Libav/FFmpeg Library
samplerate
    Rate Converter Plugin Using Samplerate Library
speexrate
    Rate Converter Plugin Using Speex Resampler
jack
    JACK Audio Connection Kit
oss
    Open Sound System
pulse
    PulseAudio Sound Server
speex
    Plugin using Speex DSP (resample, agc, denoise, echo, dereverb)
upmix
    Plugin for channel upmix (4,6,8)
vdownmix
    Plugin for channel downmix (stereo) with a simple spacialization
usbstream:CARD=vc4hdmi0
    vc4-hdmi-0
    USB Stream Output
usbstream:CARD=vc4hdmi1
    vc4-hdmi-1
    USB Stream Output
hw:CARD=tac5x1xsoundcar,DEV=0
    tac5x1x-soundcard, 1f000a0000.i2s-tac5x1x-hifi tac5x1x-hifi-0
    Direct hardware device without any conversions
plughw:CARD=tac5x1xsoundcar,DEV=0
    tac5x1x-soundcard, 1f000a0000.i2s-tac5x1x-hifi tac5x1x-hifi-0
    Hardware device with all software conversions
sysdefault:CARD=tac5x1xsoundcar
    tac5x1x-soundcard, 1f000a0000.i2s-tac5x1x-hifi tac5x1x-hifi-0
    Default Audio Device
dsnoop:CARD=tac5x1xsoundcar,DEV=0
    tac5x1x-soundcard, 1f000a0000.i2s-tac5x1x-hifi tac5x1x-hifi-0
    Direct sample snooping device
usbstream:CARD=tac5x1xsoundcar
    tac5x1x-soundcard
    USB Stream Output