WHAT'S THAT SIGNAL SOUND LIKE?

	BAUDOT		PSK31
	SITOR A		MFSK16
	SITOR B		COHERENT CW
	SWED-ARQ		MT63
	ARQ-E3		THROB
	ARQ-M2		MORSE CODE
	JAERO		PORTISHEAD RADIO GKB 4
	G-TOR		MOSAIC
	AUTOCAB		ALE400
	P3D BEACON		PACKET
	POCSAC		5/6 TONE PAGING
	MOBITEX		COQUELET
	PICCOLO		GSM
	ACARS		HFDL - HF ACARS
	GMDSS		SSR (SQUAWK)
	NATO SEL CALL TONE		ICAO SEL CALL TONE
	US MILITARY 4 FREQ		FELD-HELL
	CLOVER		PACTOR
	NOAA		WEFAX
	DSC		AIS
	ORBCOMM		FUNCUBE
	FLEX		VDL-2
	RADIO BEACON		WEATHER  BUOYS
	PICTOAUD		SSTV - MARTIN 1
	BUL-F7B-240		CROWD
	STANAG 4285		UK MILITARY 300
	MFDSC		JAERO

Don't expect to be able to decipher all commercial transmissions that you come across a great majority will be encrypted, some of these modes are most likely obsolete now.