Annotation	pos	Low Freq (Hz)	High Freq (Hz)	Begin Time (s)	End Time (s)	duration	filename
E	51.325	257.29372500000034	731.2522750000004	51.025000000000006	51.625	0.5999999999999943	20250409_091635UTC_V00OS11.WAV
U	53.4	907.293725	1056.252275	52.7625	54.0375	1.2750000000000057	20250409_091635UTC_V00OS11.WAV
E	54.993752	473.9605000000004	717.7105000000004	54.575004	55.4125	0.8374960000000016	20250409_091635UTC_V00OS11.WAV