GET http://localhost:8000/generate_audio
content-type: application/json; charset=utf-8

{
  "main_frequency": 200,
  "lag_frequency": 202,
  "volume": 0.05,
  "breath_pattern_in": 4,
  "breath_pattern_out": 8,
  "bell_sound": "339810__inspectorj__hand-bells-a-single-mod.wav"
}
