Annotation	pos	Low Freq (Hz)	High Freq (Hz)	Begin Time (s)	End Time (s)	duration	filename
U	50.262504	920.8312749999996	1137.4977249999995	49.062504	51.462504	2.4000000000000057	20250421_212835UTC_V00OS11.WAV
U	31.237504	1963.541775	2098.958225	30.500004	31.975004	1.4750000000000014	20250421_212835UTC_V00OS11.WAV