Annotation	pos	Low Freq (Hz)	High Freq (Hz)	Begin Time (s)	End Time (s)	duration	filename
U	51.056248	677.0812750000002	853.1227250000002	50.025	52.087496	2.062495999999996	20250409_211035UTC_V00OS11.WAV
"B"""	41.043752	0.0	189.5812750000001	40.962502	41.125002	0.1624999999999943	20250409_211035UTC_V00OS11.WAV