Annotation	pos	Low Freq (Hz)	High Freq (Hz)	Begin Time (s)	End Time (s)	duration	filename
E	45.55	162.50000000000017	771.8750000000002	45.3	45.8	0.5	20250206_164450UTC_V00OS11.WAV
D	49.062496	27.0822500000001	771.87175	48.849996	49.274996	0.4249999999999971	20250206_164450UTC_V00OS11.WAV