An early version of this track was featured on the Boards of Canada website in 2002 (now available here) as an infinite interactive loop. The playback could be controlled via keyboard, making it possible to hear distinct parts of the track separately.
The Shockwave Director file for the track featured on the 2002 website was named "tellia".[1]
"Seven Forty Seven" was released in 2009 on Warp20 (Unheard) as the first track.
It has been documented by fans that the vinyl version of "Seven Forty Seven" can be played at both 33 1/3 and 45 rpm, revealing different elements of the song in each version played.
According to the Boards of Canada official twitter, the version which appeared on Warp20 is from 2003. [2]
MDG: "If you listen very closely to the release version, you'll hear Freddie Mercury."[3]
"Seven Forty Seven" is in reference to the Boeing 747 aircraft, which was first entered into service in 1970. Many themes of BoC's music involve references to air travel and the 1970's.