/Raspi-Voice-Interaction-Hat

Primary LanguagePython

Raspi Voice Interaction Hat

/*
Version:		V1.0
Author:			Vincent
Create Date:	2020/11/4
Note:
	
	
*/

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OVERVIEW

Introduce

Makerfabs home page

Makerfabs Wiki

Voice Interaction Hat for Raspberry Pi is an expansion board designed for Raspberry Pi, which provides voice input and audio output, can be used in AI and voice applications.

wiki link

Features

  • WM8960, the low power, high-quality stereo CODEC.
  • 2 analog microphones.
  • More than 1 meters radius voice capture
  • 3W power speaker.
  • Provides 3 additional buttons.
  • Support Raspberry Pi Zero, Raspberry Pi 1 B+, Pi 2 B, Pi 3 B, Pi 3 B+.

Voice Interaction Hat for raspi 102.jpg

Driver

Use voice card driver from seeed : seeed-voicecard

The product is designed with reference to the ReSpeaker 4 Mic Array product of seeed. When using Raspberry Pi to drive this expansion board, you can use the seeed driver to drive it to work.

This sound card is consistent with ReSpeaker Mic Hat.

Get the seeed voice card source code. and install all linux kernel drivers

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

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

#for ReSpeaker 2-mic
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: seeed2micvoicec [seeed-2mic-voicecard], device 0: bcm2835-i2s-wm8960-hifi wm8960-hifi-0 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
pi@raspberrypi:~/seeed-voicecard $ arecord -l
**** List of CAPTURE Hardware Devices ****
card 1: seeed2micvoicec [seeed-2mic-voicecard], device 0: bcm2835-i2s-wm8960-hifi wm8960-hifi-0 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
pi@raspberrypi:~/seeed-voicecard $

How To Use

Record

arecord  -c 2 -r 16000 -f S16_LE -Dhw:1,0 -d 5 result.wav

16 KHZ, 16bit, 2 channel, 5 second recording.

Play

aplay -Dhw:1,0 result.wav

Play wav format files.