from pydub import AudioSegment
import io

def convert_audio(raw_bytes: bytes, fmt: str):
    # raw mono 32-bit float fake waveform
    seg = AudioSegment(
        raw_bytes,
        frame_rate=22050,
        sample_width=4,
        channels=1
    )
    buf=io.BytesIO()
    seg.export(buf, format=fmt)
    mime={
        "wav":"audio/wav",
        "mp3":"audio/mpeg",
        "ogg":"audio/ogg"
    }.get(fmt,"audio/wav")
    return buf.getvalue(), mime