Annotation	pos	Low Freq (Hz)	High Freq (Hz)	Begin Time (s)	End Time (s)	duration	filename
D	50.931248	0.0	677.0822499999999	50.662498	51.199998	0.5374999999999943	20250413_232235UTC_V00OS11.WAV
E	49.875	365.6227249999996	677.0812749999997	49.4625	50.2875	0.8250000000000028	20250413_232235UTC_V00OS11.WAV
E	50.943752	13.53949999999992	663.5394999999999	50.687502	51.200002000000005	0.5125000000000028	20250413_232235UTC_V00OS11.WAV
B	36.337504	13.54372500000035	162.50227500000034	36.250004	36.425004	0.1749999999999971	20250413_232235UTC_V00OS11.WAV