Python - Convert Array of Float audio data to wav file

Question

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?

waveFile.wr(b''.join(frames)) --> wrong syntax, correction : waveFile.writeframes(b''.join(frames)) — Davin Reinaldo Gozali
Please add the library import statements: I don't know how you're creating these wav's — WestCoastProjects

Aly Hosny Aly Hosny · Accepted Answer · 2020-04-23T12:31:55

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

Python - Convert Array of Float audio data to wav file

1 Answers