Annotation	pos	Low Freq (Hz)	High Freq (Hz)	Begin Time (s)	End Time (s)	duration	filename
E	55.237504	555.2082249999999	744.7917749999999	54.575004	55.900004	1.3250000000000028	20250409_195835UTC_V00OS11.WAV
U	51.343752	582.2937249999998	731.2522749999998	50.687504	52.0	1.312495999999996	20250409_195835UTC_V00OS11.WAV
U	55.25	568.7499999999999	731.2499999999999	54.6	55.9	1.2999999999999972	20250409_195835UTC_V00OS11.WAV
E	53.043752	514.5832250000003	744.7917750000004	52.600004	53.4875	0.8874959999999987	20250409_195835UTC_V00OS11.WAV