"Wavelength" is the title song from the 1978 album by Northern Irish singer-songwriter Van Morrison.

Released as a single in 1978, it climbed to number forty two in the US charts, and stayed in the Hot 100 for eleven weeks.

In his biography, Brian Hinton states that it is, "a love song about the mysterious and unspoken communication between a couple" and also refers to the singer's adolescent years when he would listen to the Voice of America and the sounds of his favorite artists such as Ray Charles singing "Come back baby, come back".

[4] The Allmusic reviewer wrote that, "'Wavelength' makes some nods to its era (1978), most notably and obviously via the use of fat 1970s synthesizers—played by Peter Bardens—which play spacy loops that mimic the interference and bubbling feedback one gets when dialing up shortwave radio stations.

It is a little bit of cleverness, as Morrison elicits the same feelings on his own recording that he no doubt had discovering his favorite new music.