ID, duration, wav, wav_format, wav_opts
noise1, 33.12325, $noise_folder/noise1.wav, wav,
noise2, 5.0, $noise_folder/noise2.wav, wav,
noise3, 1.0, $noise_folder/noise3.wav, wav, start:0 stop:16000
noise4, 17.65875, $noise_folder/noise4.wav, wav,
noise5, 13.685625, $noise_folder/noise5.wav, wav,