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【硬件交流】
RK3308B PLUSS CC + MIC阵列录音无声
发表于 2020-6-29 14:54:41
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回复：6
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硬件 ： 智能IoT开发套件 + MOD-MIC-4XAnalog麦克风阵列模块
固件：ROC-RK3308B-CC-PLUS-Qt-rgb_7.0inch-VoIP-20200511
操作步骤：
/ # cat /proc/asound/cards
0 [rockchiprk3308b]: rockchip_rk3308 - rockchip,rk3308b-acodec
rockchip,rk3308b-acodec
1 [Audio ]: USB-Audio - AC108 USB Audio
XPowers AND ST AC108 USB Audio at usb-ff440000.usb-1.1, full speed
7 [Loopback ]: Loopback - Loopback
Loopback 1
/ # amixer cset name='ADC MIC Group 0 Left Volume' 3
numid=1,iface=MIXER,name='ADC MIC Group 0 Left Volume'
; type=INTEGER,access=rw---R--,values=1,min=0,max=3,step=0
: values=3
| dBrange-
rangemin=0,,rangemax=0
| dBscale-min=0.00dB,step=0.00dB,mute=0
rangemin=1,,rangemax=1
| dBscale-min=6.60dB,step=0.00dB,mute=0
rangemin=2,,rangemax=2
| dBscale-min=13.00dB,step=0.00dB,mute=0
rangemin=3,,rangemax=3
| dBscale-min=20.00dB,step=0.00dB,mute=0
/ # amixer cset name='ADC MIC Group 0 Right Volume' 3
numid=2,iface=MIXER,name='ADC MIC Group 0 Right Volume'
; type=INTEGER,access=rw---R--,values=1,min=0,max=3,step=0
: values=3
| dBrange-
rangemin=0,,rangemax=0
| dBscale-min=0.00dB,step=0.00dB,mute=0
rangemin=1,,rangemax=1
| dBscale-min=6.60dB,step=0.00dB,mute=0
rangemin=2,,rangemax=2
| dBscale-min=13.00dB,step=0.00dB,mute=0
rangemin=3,,rangemax=3
| dBscale-min=20.00dB,step=0.00dB,mute=0
/ # amixer cset name='ADC ALC Group 0 Left Volume' 13
numid=61,iface=MIXER,name='ADC ALC Group 0 Left Volume'
; type=INTEGER,access=rw---R--,values=1,min=0,max=31,step=0
: values=13
| dBscale-min=-18.00dB,step=1.50dB,mute=1
/ # ami?[?[?[J
/bin/sh: a: not found
/ # amixer cset name='ADC ALC Group 0 Right Volume' 13
numid=62,iface=MIXER,name='ADC ALC Group 0 Right Volume'
; type=INTEGER,access=rw---R--,values=1,min=0,max=31,step=0
: values=13
| dBscale-min=-18.00dB,step=1.50dB,mute=1
/ # arecord -D hw:0,0 -c 8 -r 16000 -f S16_LE test.wav
Recording WAVE 'test.wav' : Signed 16 bit Little Endian, Rate 16000 Hz, Channels 8
^CAborted by signal Interrupt...
/ # ?[J
/ # ?[Jcord -D hw:0,0 -c 8 -r 16000 -f S16_LE test.wav?[J
/ # ls
bin etc linuxrc mnt proc run sys tmp usr
data lib lost+found oem rockchip_test sbin system udisk var
dev lib64 media opt root sdcard test.wav userdata
/ # ls test.wav
test.wav
/ # aplay test.wav
Playing WAVE 'test.wav' : Signed 16 bit Little Endian, Rate 16000 Hz, Channels 8
^CAborted by signal Interrupt...
/ # ls -l test.wav
-rw-r--r-- 1 root root 10176044 Jun 22 20:56 test.wav
/ #
: values=13
| dBscale-min=-18.00dB,step=1.50dB,mute=1
/ # ami?[?[?[J
/bin/sh: a: not found
/ # amixer cset name='ADC ALC Group 0 Right Volume' 13
numid=62,iface=MIXER,name='ADC ALC Group 0 Right Volume'
; type=INTEGER,access=rw---R--,values=1,min=0,max=31,step=0
: values=13
| dBscale-min=-18.00dB,step=1.50dB,mute=1
/ # arecord -D hw:0,0 -c 8 -r 16000 -f S16_LE test.wav
Recording WAVE 'test.wav' : Signed 16 bit Little Endian, Rate 16000 Hz, Channels
8
^CAborted by signal Interrupt...
/ # ?[J
/ # ?[Jcord -D hw:0,0 -c 8 -r 16000 -f S16_LE test.wav?[J
/ # ls
bin etc linuxrc mnt proc run sys tmp usr
data lib lost+found oem rockchip_test sbin system udisk var
dev lib64 media opt root sdcard test.wav userdata
/ # ls test.wav
test.wav
/ # aplay test.wav 无声！
Playing WAVE 'test.wav' : Signed 16 bit Little Endian, Rate 16000 Hz, Channels 8
1. 如上进行了录音操作， adb pull到电脑上回放没有声音， 是未能录音成功！
2. 尝试Usb audio设备， 仍然不成功
arecord -D hw:1,0 -c 8 -r 16000 -f S16_LE test.wav
3. 怀疑是3.5mm耳机插着的原因， 取下3.5mm耳机, 再次用MIC阵列录音也未能成功。
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