Quick and dirty Python script to allow a handsfree recording, based on https://pimylifeup.com/raspberry-pi-porcupine/

showermic

#!/usr/bin/env python3

import struct
import pyaudio
import pvporcupine
import wave
import time

porcupine = None
pa = None
audio_stream = None
wav_data = []
recording = 0

try:
    porcupine = pvporcupine.create(keywords=["picovoice", "blueberry"])

    pa = pyaudio.PyAudio()

    audio_stream = pa.open(
                    # input_device_index=3,
                    rate=porcupine.sample_rate,
                    channels=1,
                    format=pyaudio.paInt16,
                    input=True,
                    frames_per_buffer=porcupine.frame_length)

    while True:
        voice_pcm = audio_stream.read(porcupine.frame_length)
        wake_pcm = struct.unpack_from("h" * porcupine.frame_length, voice_pcm)

        keyword_index = porcupine.process(wake_pcm)

        if keyword_index >= 0:
            if recording == 0:
                print("Hotword Detected, recording started.")
                recording = time.time()
                wav_data = []

            if time.time() > recording + 3:
                print("Hotword Detected, recording stopped.")
                recording = 0
                timestr = time.strftime("%Y%m%d-%H%M%S")
                wave_file_name = "/tmp/showermic_" + timestr + ".wav"
                wave_file = wave.open(wave_file_name, 'wb')
                wave_file.setnchannels(1)
                wave_file.setsampwidth(pa.get_sample_size(pyaudio.paInt16))
                wave_file.setframerate(porcupine.sample_rate)
                wave_file.writeframes(b''.join(wav_data))
                wave_file.close()
                print("Recording save as " + wave_file_name)

        if recording > 0:
            wav_data.append(voice_pcm)

finally:
    if porcupine is not None:
        porcupine.delete()

    if audio_stream is not None:
        audio_stream.close()

    if pa is not None:
            pa.terminate()