seeed-voicecard

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.

Get the seeed voice card source code.

git clone https://github.com/respeaker/seeed-voicecard
cd seeed-voicecard
sudo ./install.sh
reboot

Check that the sound card name matches the source code seeed-voicecard.

pi@raspberrypi:~/seeed-voicecard$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: ALSA [bcm2835 ALSA], device 0: bcm2835 ALSA [bcm2835 ALSA]
  Subdevices: 8/8
  Subdevice #0: subdevice #0
  Subdevice #1: subdevice #1
  Subdevice #2: subdevice #2
  Subdevice #3: subdevice #3
  Subdevice #4: subdevice #4
  Subdevice #5: subdevice #5
  Subdevice #6: subdevice #6
  Subdevice #7: subdevice #7
card 0: ALSA [bcm2835 ALSA], device 1: bcm2835 ALSA [bcm2835 IEC958/HDMI]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: seeedvoicecard [seeed-voicecard], device 0: bcm2835-i2s-wm8960-hifi wm8960-hifi-0 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
pi@raspberrypi:~/seeed-voicecard$ 

Next apply the alsa controls setting

sudo alsactl --file=asound.state restore

If you want to change the alsa settings, You can use sudo alsactl --file=asound.state store to save it.

Test:

arecord -f cd -Dhw:1 | aplay -Dhw:1

with Google Assistant

if you run the assistant but the playback is speed up considerably, try to configure alsa:

sudo cp asound.conf /etc/asound.conf

If the alsa configuration doesn't solve the issue, try to use pulseaudio. See #4

Enjoy !