Annotation	pos	Low Freq (Hz)	High Freq (Hz)	Begin Time (s)	End Time (s)	duration	filename
D	50.287496	121.87175000000012	1286.45725	50.037496	50.537496	0.5	20250414_202835UTC_V00OS11.WAV
M	51.143752	54.16449999999965	176.03949999999963	50.837502	51.450002	0.6124999999999972	20250414_202835UTC_V00OS11.WAV