"""Generate silent teaching files; no human voice or provider output."""
import wave
from pathlib import Path
for name,frames,rate,channels in [('mono.synthetic.wav',24000,16000,1),('stereo.synthetic.wav',18000,8000,2)]:
    with wave.open(str(Path(__file__).parent/name),'wb') as w:
        w.setnchannels(channels);w.setsampwidth(2);w.setframerate(rate);w.writeframes(b'\0\0'*frames*channels)
print('Created silent PCM fixtures: 1.5 s mono and 2.25 s stereo.')