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Baozhu Zuo 2017-09-14 20:22:02 +08:00
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README.md
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@ -1,20 +1,26 @@
# seeed-voicecard
[![Join the chat at https://gitter.im/seeed-voicecard/Lobby](https://badges.gitter.im/seeed-voicecard/Lobby.svg)](https://gitter.im/seeed-voicecard/Lobby?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
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While the upstream wm8960 codec is not currently supported by current Pi kernel builds, upstream wm8960 has some bugs, we had fixed it. we must it build manually.
We also write ac108 rapberry pi linux kernel driver.
Get the seeed voice card source code.
```
git clone https://github.com/respeaker/seeed-voicecard
cd seeed-voicecard
sudo ./install.sh
#2mic
sudo ./install.sh 2mic
#4mic
sudo ./install.sh 4mic
reboot
```
Check that the sound card name matches the source code seeed-voicecard.
```
#2mic
pi@raspberrypi:~/seeed-voicecard$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: ALSA [bcm2835 ALSA], device 0: bcm2835 ALSA [bcm2835 ALSA]
@ -34,16 +40,45 @@ card 1: seeedvoicecard [seeed-voicecard], device 0: bcm2835-i2s-wm8960-hifi wm89
Subdevices: 1/1
Subdevice #0: subdevice #0
pi@raspberrypi:~/seeed-voicecard$
```
Next apply the alsa controls setting
```
sudo alsactl --file=asound.state restore
#4mic
pi@raspberrypi:~ $ arecord -L
null
Discard all samples (playback) or generate zero samples (capture)
playback
capture
dmixed
array
ac108
default:CARD=seeed4micvoicec
seeed-4mic-voicecard,
Default Audio Device
sysdefault:CARD=seeed4micvoicec
seeed-4mic-voicecard,
Default Audio Device
dmix:CARD=seeed4micvoicec,DEV=0
seeed-4mic-voicecard,
Direct sample mixing device
dsnoop:CARD=seeed4micvoicec,DEV=0
seeed-4mic-voicecard,
Direct sample snooping device
hw:CARD=seeed4micvoicec,DEV=0
seeed-4mic-voicecard,
Direct hardware device without any conversions
plughw:CARD=seeed4micvoicec,DEV=0
seeed-4mic-voicecard,
Hardware device with all software conversions
pi@raspberrypi:~ $
```
If you want to change the alsa settings, You can use `sudo alsactl --file=asound.state store` to save it.
Test:
```
```
#2mic
arecord -f cd -Dhw:1 | aplay -Dhw:1
#4mic
arecord -Dac108 -f S32_LE -r 16000 -c 4 a.wav
```
### with Google Assistant