The repository contains some examples to use ReSpeaker series mic arrays on Raspberry Pi.
The examples are included in the custom image with pre-installed seeed-voicecard, snowboy, voice-engine and etc. You can flash the custom image to get started easily.
ReSpeaker 2 Mic Hat, ReSpeaker 4 Mic Array or ReSpeaker 6 Mic Array (they are all pi hats)
- snowboy for KWS (Keyword Search / Keyword Spotting)
- webrtc audio processing for NS (Noise Suppression)
- speexdsp for AEC (Acoustic Echo Cancellation)
- GCC-PHAT for DOA (Direction Of Arrial)
- avs for alexa voice service
- voice-engine for connecting all the elements together
pip install webrtc-audio-processing speexdsp voice-engine avs
and go to kitt-ai/snowboy to install snowboy.
├── 2mic # ReSpeaker 2 Mic Hat
│ └── ns_kws_doa_alexa.py hands-free alexa with NS, KWS and DOA (0 ~ 180 degree)
├── 4mic # ReSpeaker 4 Mic Array
│ ├── kws_doa.py KWS and then DOA
│ ├── ns_kws_doa_alexa.py hands-free alexa with NS, KWS and DOA (0 ~ 360 degree)
│ └── ns_kws_doa.py
├── 6mic # ReSpeaker 6 Mic Array
│ ├── aec_ns_kws_doa_alexa.py hands-free alexa with AEC, NS, KWS and DOA (0 ~ 360 degree)
│ ├── aec_ns_kws_doa.py has 2 loopback channels for AEC
│ └── kws_doa.py
├── ns_kws_alexa.py
├── ns_kws.py
└── ns_vs_raw.py Compare KWS between raw audio and audio with NS