CODEWITHSUNDEEP
pythonaudioencodingwavwave
Alexander idid
Alexander idid

Reputation: 11

Audio quality issues when converting to WAV from a specific format

I'm working on converting audio obtained from phone calls to WAV files for playback. The audio has a sample rate of 8000 Hz and an AudioEncoding of LINEAR16. However, the resulting WAV file is very noisy and difficult to understand.

Here is the code I am using for the conversion:

import wave
import audioop

#audio_data is an example of how the audio comes 
audio_data = (
    b'@\x00X\x00p\x00h\x00X\x00H\x00@\x008\x00(\x00 \x00\x1f'
    b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'
    b'\x18\x00\x08\x00\xf0\xff\xe8\xffx00H\x000\x00(\x00 \x00'
    b'\x00\x00\x00\x00\x00\x00\x00\x00\x0@\x00X\x00p\@\x00X'
)

#This part is optional and is to use decode G711u -- It works worse if I use it
audio_pcm = audioop.ulaw2lin(audio_data, 2)

with wave.open("output.wav", "wb") as wav_file:
    # Configurar los parámetros del archivo WAV
    wav_file.setnchannels(1)  # Mono
    wav_file.setsampwidth(2)  # 16 bits por muestra
    wav_file.setframerate(8000)  # Frecuencia de muestreo

    # Escribir los datos PCM al archivo
    wav_file.writeframes(audio_pcm)

The output.wav file I get is very noisy and the words are almost inaudible. I have verified the following aspects:

• The sampling rate is correct (8000 Hz).

• The WAV file configuration appears correct.

• Another option I tried is to use decode G711u but it works worse.

Does anyone have any idea why the resulting audio is so noisy? Could there be a problem with the way the WAV file is being processed or configured?

Thanks for any help you can offer.

Upvotes: 0

Views: 46

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