Dickey Betts Tempo? matherton charts harmonic probable speed – the allman brothers band-Jessica Matherton 2 years ago Luka-Suzanne-Vega “Jessica” is a song written and performed by the Allman brothers band in the early 1970s. This was a Dickey Betts song. Jessica / probable harmonic rhythm chart Share this: RelatedJOHN MAYER - unclassified tempo maps feat Say, Stop This Train | videoJune 18, 2018In "brainwashing is a myth"Lover Lay Down, live - Tim Reynolds & Dave Matthews at Luther College. Declassified harmonic tempo probability chart and video embed.October 11, 2017In "Frequency"Pink Floyd, Us And Them - declassified matherton diagram | link to youtubeDecember 2, 2018In "community"