Annotation	pos	Low Freq (Hz)	High Freq (Hz)	Begin Time (s)	End Time (s)	duration	filename
D	20.662496	13.542749999999842	677.0822499999998	20.524996	20.799996	0.2749999999999986	20250216_040250UTC_V00OS11.WAV
C	20.668752	13.53949999999992	663.5394999999999	20.500002	20.837502	0.3374999999999986	20250216_040250UTC_V00OS11.WAV