Python – Convert Array of Float audio data to wav file

I have audio data recorded from microphone like this : (ndarray of float)

> print(data)
[-0.00762939 -0.00817871 -0.00714111 ...  0.0265511   0.02484207   0.02377392]

This is my code:

while(recording):
   frames.append(data)

waveFile = wave.open(WAVE_OUTPUT_FILENAME + "_" + str(COUNT_FILE) + ".wav", 'wb')
waveFile.setnchannels(CHANNELS)
waveFile.setsampwidth(audio.get_sample_size(FORMAT))
waveFile.setframerate(RATE)
waveFile.wr(b''.join(frames))
waveFile.close()

But when I play the audio it become broken, nothing but just noise… how to convert it into .wav audio file?

Answer

you need to use pack your data first using struct

replace your waveFile.writeframeswith this

data=struct.pack( 'h' * len(frames), *frames )
waveFile.writeframes(data)

and maybe also convert your data to integers since I think wav files uses only integers values