Annotation	pos	Low Freq (Hz)	High Freq (Hz)	Begin Time (s)	End Time (s)	duration	filename
F	47.731248	0.0022749999997984	501.04372499999977	47.562498	47.899998	0.3375000000000057	20250411_201035UTC_V00OS11.WAV
A	26.518752	27.08127499999965	203.1227249999997	26.175002	26.862502	0.6875	20250411_201035UTC_V00OS11.WAV