239 lines
8 KiB
Markdown
239 lines
8 KiB
Markdown
# seeed-voicecard
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[](https://gitter.im/seeed-voicecard/Lobby?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
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The drivers of [ReSpeaker Mic Hat](https://www.seeedstudio.com/ReSpeaker-2-Mics-Pi-HAT-p-2874.html),[ReSpeaker 4 Mic Array](https://www.seeedstudio.com/ReSpeaker-4-Mic-Array-for-Raspberry-Pi-p-2941.html),[6-Mics Circular Array Kit](), and [4-Mics Linear Array Kit]() for Raspberry Pi.
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### Install seeed-voicecard
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Get the seeed voice card source code. and install all linux kernel drivers
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```bash
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git clone https://github.com/respeaker/seeed-voicecard
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cd seeed-voicecard
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sudo ./install.sh
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sudo reboot
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```
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## ReSpeaker Mic Hat
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[](https://www.seeedstudio.com/ReSpeaker-2-Mics-Pi-HAT-p-2874.html)
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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.
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Check that the sound card name matches the source code seeed-voicecard.
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```bash
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#for ReSpeaker 2-mic
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pi@raspberrypi:~/seeed-voicecard $ aplay -l
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**** List of PLAYBACK Hardware Devices ****
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card 0: ALSA [bcm2835 ALSA], device 0: bcm2835 ALSA [bcm2835 ALSA]
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Subdevices: 8/8
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Subdevice #0: subdevice #0
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Subdevice #1: subdevice #1
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Subdevice #2: subdevice #2
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Subdevice #3: subdevice #3
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Subdevice #4: subdevice #4
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Subdevice #5: subdevice #5
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Subdevice #6: subdevice #6
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Subdevice #7: subdevice #7
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card 0: ALSA [bcm2835 ALSA], device 1: bcm2835 ALSA [bcm2835 IEC958/HDMI]
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Subdevices: 1/1
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Subdevice #0: subdevice #0
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card 1: seeed2micvoicec [seeed-2mic-voicecard], device 0: bcm2835-i2s-wm8960-hifi wm8960-hifi-0 []
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Subdevices: 1/1
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Subdevice #0: subdevice #0
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pi@raspberrypi:~/seeed-voicecard $ arecord -l
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**** List of CAPTURE Hardware Devices ****
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card 1: seeed2micvoicec [seeed-2mic-voicecard], device 0: bcm2835-i2s-wm8960-hifi wm8960-hifi-0 []
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Subdevices: 1/1
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Subdevice #0: subdevice #0
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pi@raspberrypi:~/seeed-voicecard $
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```
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If you want to change the alsa settings, You can use `sudo alsactl --file=/etc/voicecard/wm8960_asound.state store` to save it.
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#### Next step
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Go to https://github.com/respeaker/mic_hat to build voice enabled projects with Google Assistant SDK or Alexa Voice Service.
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## ReSpeaker 4 Mic Array
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[](https://www.seeedstudio.com/ReSpeaker-4-Mic-Array-for-Raspberry-Pi-p-2941.html)
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The 4 Mic Array uses ac108 which includes 4 ADCs, we also write ac108 rapberry pi linux kernel driver.
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Check that the sound card name matches the source code seeed-voicecard.
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```bash
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#for ReSpeaker 4 Mic Array
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pi@raspberrypi:~ $ arecord -L
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null
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Discard all samples (playback) or generate zero samples (capture)
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playback
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capture
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dmixed
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array
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ac108
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default:CARD=seeed4micvoicec
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seeed-4mic-voicecard,
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Default Audio Device
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sysdefault:CARD=seeed4micvoicec
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seeed-4mic-voicecard,
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Default Audio Device
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dmix:CARD=seeed4micvoicec,DEV=0
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seeed-4mic-voicecard,
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Direct sample mixing device
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dsnoop:CARD=seeed4micvoicec,DEV=0
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seeed-4mic-voicecard,
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Direct sample snooping device
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hw:CARD=seeed4micvoicec,DEV=0
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seeed-4mic-voicecard,
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Direct hardware device without any conversions
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plughw:CARD=seeed4micvoicec,DEV=0
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seeed-4mic-voicecard,
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Hardware device with all software conversions
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pi@raspberrypi:~ $
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```
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If you want to change the alsa settings, You can use `sudo alsactl --file=/etc/voicecard/ac108_asound.state store` to save it.
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## 6-Mics Circular Array Kit
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[]()
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The 6 Mics Circular Array Kit uses ac108 x 2 / ac101 x 1 / micphones x 6, includes 8 ADCs and 2 DACs.
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The driver is implemented with 8 input channels & 8 output channels.
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>**The first 6 input channel are MIC recording data,
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the rest 2 input channel are echo channel of playback
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The first 2 output channel are playing data, the rest 6 output channel are dummy**
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Check that the sound card name matches the source code seeed-voicecard.
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```bash
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#for 6 Mic Circular Array
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pi@raspberrypi:~ $ arecord -L
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null
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Discard all samples (playback) or generate zero samples (capture)
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default
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playback
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dmixed
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ac108
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multiapps
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ac101
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sysdefault:CARD=seeed8micvoicec
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seeed-8mic-voicecard,
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Default Audio Device
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dmix:CARD=seeed8micvoicec,DEV=0
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seeed-8mic-voicecard,
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Direct sample mixing device
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dsnoop:CARD=seeed8micvoicec,DEV=0
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seeed-8mic-voicecard,
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Direct sample snooping device
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hw:CARD=seeed8micvoicec,DEV=0
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seeed-8mic-voicecard,
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Direct hardware device without any conversions
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plughw:CARD=seeed8micvoicec,DEV=0
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seeed-8mic-voicecard,
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Hardware device with all software conversions
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pi@raspberrypi:~ $ aplay -L
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null
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Discard all samples (playback) or generate zero samples (capture)
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default
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playback
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dmixed
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ac108
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multiapps
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ac101
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sysdefault:CARD=ALSA
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bcm2835 ALSA, bcm2835 ALSA
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Default Audio Device
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dmix:CARD=ALSA,DEV=0
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bcm2835 ALSA, bcm2835 ALSA
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Direct sample mixing device
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dmix:CARD=ALSA,DEV=1
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bcm2835 ALSA, bcm2835 IEC958/HDMI
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Direct sample mixing device
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dsnoop:CARD=ALSA,DEV=0
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bcm2835 ALSA, bcm2835 ALSA
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Direct sample snooping device
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dsnoop:CARD=ALSA,DEV=1
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bcm2835 ALSA, bcm2835 IEC958/HDMI
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Direct sample snooping device
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hw:CARD=ALSA,DEV=0
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bcm2835 ALSA, bcm2835 ALSA
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Direct hardware device without any conversions
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hw:CARD=ALSA,DEV=1
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bcm2835 ALSA, bcm2835 IEC958/HDMI
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Direct hardware device without any conversions
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plughw:CARD=ALSA,DEV=0
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bcm2835 ALSA, bcm2835 ALSA
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Hardware device with all software conversions
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plughw:CARD=ALSA,DEV=1
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bcm2835 ALSA, bcm2835 IEC958/HDMI
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Hardware device with all software conversions
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sysdefault:CARD=seeed8micvoicec
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seeed-8mic-voicecard,
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Default Audio Device
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dmix:CARD=seeed8micvoicec,DEV=0
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seeed-8mic-voicecard,
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Direct sample mixing device
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dsnoop:CARD=seeed8micvoicec,DEV=0
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seeed-8mic-voicecard,
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Direct sample snooping device
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hw:CARD=seeed8micvoicec,DEV=0
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seeed-8mic-voicecard,
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Direct hardware device without any conversions
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plughw:CARD=seeed8micvoicec,DEV=0
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seeed-8mic-voicecard,
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Hardware device with all software conversions
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```
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## 4-Mics Linear Array Kit
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[]()
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In contrast to 6-Mics Circular Array Kit for Raspberry Pi,
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the difference is only first 4 input channels are valid capturing data.
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#### Test:
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```bash
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#for ReSpeaker 2-mic
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#It will capture sound an playback on hw:1
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arecord -f cd -Dhw:1 | aplay -Dhw:1
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```
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```bash
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#for ReSpeaker 4-mic
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#It will capture sound on AC108 and save as a.wav
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arecord -Dac108 -f S32_LE -r 16000 -c 4 a.wav
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```
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```bash
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#for 6-Mics Circular Array Kit and 4-Mics Linear Array Kit
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#It will capture sound on AC108 and save as a.wav
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arecord -Dac108 -f S32_LE -r 16000 -c 8 a.wav
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#Take care of that the captured mic audio is on the first 6 channels
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#It will play sound file a.wav on AC101
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aplay -D ac101 a.wav
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#Do not use -D plughw:1,0 directly except your wave file is single channel only.
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```
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**Note: for developer using 6-Mics Circular Array Kit(or 4-Mics Linear Array Kit) doing capturing & playback the same time,
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capturing must be start first, or else the capturing channels will miss order.**
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### uninstall seeed-voicecard
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If you want to upgrade the driver , you need uninstall the driver first.
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```
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pi@raspberrypi:~/seeed-voicecard $ sudo ./uninstall.sh
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...
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------------------------------------------------------
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Please reboot your raspberry pi to apply all settings
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Thank you!
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------------------------------------------------------
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```
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Enjoy !
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