Hi Zaid, thanks for the question. Yes, you can but you need to format the audio into a WAV and ensure that the sample rate is 8000 Hz(mono channel).
Then you can send that WAV file back to the user:
audio = AudioSegment.from_mp3("your_file.mp3")
audio = audio.set_frame_rate(8000).set_channels(1)
audio.export("output.wav", format="wav")
f = wave.open('output.wav', 'rb')
frames = f.getnframes()
data = f.readframes(frames)
f.close()
call.write_audio(data)
I suggest looking into my web socket tutorial over at: kevincoder.co.za/how-i-used-voice-ai-to-bring-ima…
You don't need to use WebRTC if you need the phone system, you can use Twilio media streams or forward the call from a PBX server like Asterisk.
Hope this helps.