The Most Mysterious Song on the Internet

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"The Most Mysterious Song on the Internet" (also known as "Like the Wind", "The Sun Will Never Shine", "Blind the Wind", "Check It In, Check It Out", "Take It In, Take It Out", and "Summer Blues" after lines in fan-interpreted lyrics; sometimes referred to as "The Mysterious Song", and often acronymed as LTW, TMMS, TMS and TMMSOTI) is the nickname given to a cassette recording of an unidentified song, most likely composed in the 1980s.

The song was recorded from a German Norddeutscher Rundfunk (NDR) radio broadcast sometime during the mid-1980s, likely in or after 1984.^[1] Since 2019, this song has been the subject of a viral Internet phenomenon, with many users of sites such as Reddit and Discord involved in a collaborative effort to search for the song's origins and artist.^[1]

Throughout the search, other unknown songs have been discovered. Users online have coined the term "Lostwave" to describe songs of this nature.