Annotation	pos	Low Freq (Hz)	High Freq (Hz)	Begin Time (s)	End Time (s)	duration	filename
O	53.981248	257.2937249999999	365.627275	53.325	54.637496	1.312495999999996	20250411_064035UTC_V00OS11.WAV
C	54.437504	270.8322499999999	1029.1677499999998	54.312504	54.562504	0.25	20250411_064035UTC_V00OS11.WAV
D	40.975	243.74675	1042.70725	40.85	41.1	0.25	20250411_064035UTC_V00OS11.WAV