Annotation	pos	Low Freq (Hz)	High Freq (Hz)	Begin Time (s)	End Time (s)	duration	filename
"B"""	50.031248	0.0	189.5812750000001	49.949998	50.112498	0.1624999999999943	20250409_193435UTC_V00OS11.WAV
C	50.818752	0.0	1245.8322499999997	50.587502	51.050002000000006	0.4625000000000057	20250409_193435UTC_V00OS11.WAV
D	50.818752	27.08225000000016	1178.12175	50.575002000000005	51.062502	0.4874999999999971	20250409_193435UTC_V00OS11.WAV