How to resolve the amixer errors

[yerasiprathyusha]

I am getting the following errors while running on Openwrt :-

root@OpenWrt:/tmp/respeaker_python_library/examples# python offline_voice_assistant.py
ERROR:root:PyUSB is required on a Linux Machine
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.rear
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.center_lfe
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.side
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.hdmi
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.hdmi
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.modem
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.modem
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.phoneline
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.phoneline
_snd_pcm_gcs_io_open: rate = 16000
_snd_pcm_gcs_io_open: channels = 6
gcs_initialize: enter
osal_dev_open: open failed: 2ipc_init: dev open failed, ret = -2
pktzr_init: Initialization failed, ret = -2
gcs_init: Failed to initialize IPC packetizer
gcs_initialize: gcs_init failed, err = -2
gcs_initialize: leave
_snd_pcm_gcs_io_open: gcs_initialize failed -2
gcs_do_mixer_controls: executing the mixer controls
amixer: Unable to find simple control 'ADC MUX0',0

amixer: Unable to find simple control 'DMIC MUX0',0

amixer: Unable to find simple control 'ADC MUX1',0

amixer: Unable to find simple control 'DMIC MUX1',0

amixer: Unable to find simple control 'ADC MUX2',0

amixer: Unable to find simple control 'DMIC MUX2',0

amixer: Unable to find simple control 'ADC MUX3',0

amixer: Unable to find simple control 'DMIC MUX3',0

amixer: Unable to find simple control 'ADC MUX4',0

amixer: Unable to find simple control 'DMIC MUX4',0

amixer: Unable to find simple control 'ADC MUX5',0

amixer: Unable to find simple control 'DMIC MUX5',0

amixer: Unable to find simple control 'WDMA1 CH0 MUX',0

amixer: Unable to find simple control 'WDMA1 CH1 MUX',0

amixer: Unable to find simple control 'WDMA1 CH2 MUX',0

amixer: Unable to find simple control 'WDMA1 CH3 MUX',0

amixer: Unable to find simple control 'WDMA1 CH4 MUX',0

amixer: Unable to find simple control 'WDMA1 CH5 MUX',0

amixer: Unable to find simple control 'WDMA1_ON_OFF',0

gcs_do_mixer_controls: done enable mixer controls
Segmentation fault