{"wav": "wavs/sine_0220.wav", "text": "low tone", "sr": 16000}
{"wav": "wavs/sine_0330.wav", "text": "mid low tone", "sr": 16000}
{"wav": "wavs/sine_0440.wav", "text": "middle tone", "sr": 16000}
{"wav": "wavs/sine_0660.wav", "text": "mid high tone", "sr": 16000}
{"wav": "wavs/sine_0880.wav", "text": "high tone", "sr": 16000}