• https://alphacephei.com/vosk/
• https://github.com/alphacep/vosk-api

• https://github.com/dataquestio/project-walkthroughs/blob/master/microphone/microphone.ipynb

conda create -n vosk python=3.9
conda activate vosk
conda install -c conda-forge jupyterlab numpy matplotlib pandas 
#conda install -c conda-forge ipywidgets
#conda install -c conda-forge scipy scikit-learn                           

pip install vosk
pip install pyaudio

On Windows the vosk models are cached here: C:\Users\<username>\.cache\vosk

Missing:

ffmpeg …

<code> import pyaudio import wave

# Constants for audio recording FORMAT = pyaudio.paInt16 CHANNELS = 1 RATE = 44100 CHUNK = 1024 RECORD_SECONDS = 5 # Adjust this to change the duration of the recording OUTPUT_FILENAME = “output.wav”

def list_audio_devices():

  audio = pyaudio.PyAudio()
  devices = []
  
  for i in range(audio.get_device_count()):
      device_info = audio.get_device_info_by_index(i)
      devices.append(f"{i}: {device_info['name']}")

  audio.terminate()
  return devices

def get_input_device_index():

  devices = list_audio_devices()
  
  print("Available audio input devices:")
  for device in devices:
      print(device)

  while True:
      try:
          print("")
          print("On Becker's Dell Lat. 7330 the following works:")
          print("1: Microphone Array (Realtek(R) Au")
          print("")
          device_index = int(input("Enter the index of the desired input device: "))
          if 0 <= device_index < len(devices):
              return device_index
          else:
              print("Invalid input. Please enter a valid device index.")
      except ValueError:
          print("Invalid input. Please enter a valid device index.")

def record_audio(device_index):

  audio = pyaudio.PyAudio()

  # Open a microphone stream with the selected input device
  stream = audio.open(format=FORMAT, channels=CHANNELS,
                      rate=RATE, input=True, input_device_index=device_index,
                      frames_per_buffer=CHUNK)

  print(f"Recording from: {audio.get_device_info_by_index(device_index)['name']}")

  frames = []

  # Record audio in chunks and store it in frames
  for _ in range(0, int(RATE / CHUNK * RECORD_SECONDS)):
      data = stream.read(CHUNK)
      frames.append(data)

  print("Finished recording.")

  # Stop and close the microphone stream
  stream.stop_stream()
  stream.close()
  audio.terminate()

  # Save the recorded audio to a WAV file
  with wave.open(OUTPUT_FILENAME, 'wb') as wf:
      wf.setnchannels(CHANNELS)
      wf.setsampwidth(audio.get_sample_size(FORMAT))
      wf.setframerate(RATE)
      wf.writeframes(b''.join(frames))

if name == “main”:

  device_index = get_input_device_index()
  record_audio(device_index)

<code>