ID, duration, mix_wav, mix_wav_format, mix_wav_opts, s1_wav, s1_wav_format, s1_wav_opts, s2_wav, s2_wav_format, s2_wav_opts, s3_wav, s3_wav_format, s3_wav_opts, noise_wav, noise_wav_format, noise_wav_opts
0,1.0,$data_root/mixture_3.wav,wav,,$data_root/source1_3.wav,wav,,$data_root/source2_3.wav,wav,,$data_root/source2_3.wav,wav,,$data_root/../noise/noise3.wav,wav,