Annotation	pos	Low Freq (Hz)	High Freq (Hz)	Begin Time (s)	End Time (s)	duration	filename
O	35.65	284.3772749999998	419.79372499999977	35.125	36.175	1.0499999999999972	20250421_191635UTC_V00OS11.WAV
P	35.65	297.9145000000002	419.7895000000002	35.1	36.2	1.0999999999999943	20250421_191635UTC_V00OS11.WAV
U	0.7437496	1137.4977250000002	1286.456275	0.2000016	1.2874976	1.087496	20250421_191635UTC_V00OS11.WAV