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Microphone VAD Streaming

Stream from microphone to STT, using VAD (voice activity detection). A fairly simple example demonstrating the STT streaming API in Python. Also useful for quick, real-time testing of models and decoding parameters.

Installation

pip install -r requirements.txt

Uses portaudio for microphone access, so on Linux, you may need to install its header files to compile the pyaudio package:

sudo apt install portaudio19-dev

Installation on MacOS may fail due to portaudio, use brew to install it:

brew install portaudio

Usage

usage: mic_vad_streaming.py [-h] [-v VAD_AGGRESSIVENESS] [--nospinner]
                            [-w SAVEWAV] [-f FILE] -m MODEL [-s SCORER]
                            [-d DEVICE] [-r RATE]

Stream from microphone to STT using VAD

optional arguments:
  -h, --help            show this help message and exit
  -v VAD_AGGRESSIVENESS, --vad_aggressiveness VAD_AGGRESSIVENESS
                        Set aggressiveness of VAD: an integer between 0 and 3,
                        0 being the least aggressive about filtering out non-
                        speech, 3 the most aggressive. Default: 3
  --nospinner           Disable spinner
  -w SAVEWAV, --savewav SAVEWAV
                        Save .wav files of utterences to given directory
  -f FILE, --file FILE  Read from .wav file instead of microphone
  -m MODEL, --model MODEL
                        Path to the model (protocol buffer binary file, or
                        entire directory containing all standard-named files
                        for model)
  -s SCORER, --scorer SCORER
                        Path to the external scorer file. Default:
                        kenlm.scorer
  -d DEVICE, --device DEVICE
                        Device input index (Int) as listed by
                        pyaudio.PyAudio.get_device_info_by_index(). If not
                        provided, falls back to PyAudio.get_default_device().
  -r RATE, --rate RATE  Input device sample rate. Default: 16000. Your device
                        may require 44100.
  -k, --keyboard        Type output through system keyboards