Theories on its key vary. Some identify it as E Lydian , while others suggest F Major with a non-diatonic ♭VII chord. The core chords are typically played as E♭, F, and C major .

A popular alternative version, "Olson (Version 3)" , was recorded during their 1998 Peel Session and features a slightly different arrangement and more prominent synth leads. Performance History

According to the duo, "Olson" is the surname of a family they know.

While the brothers are secretive about their gear, fans and analysts often associate this sound with the Yamaha CS-80 or Roland SH-101 .

The melody often utilizes the F major pentatonic scale (F, G, A, C, D), which allows the notes to sit comfortably over the shifting harmonies. Sound & Production

Like much of the duo's work, "Olson" features a "warped" analog sound created through deliberate misuse of technology, such as recording to degraded magnetic tape.

The characteristic "flutter" is achieved by chaining LFOs to pitch and filter settings, creating an unstable, organic feel. Origin & Alternate Versions