According to [Roger Mayer's official site](http://www.roger-mayer.co.uk/octavia.htm) Roger lays out an official timeline of when Jimi was first introduced to this pedal: "1. The Octavia / Octavio sound was first heard on record in the solo of "Purple Haze" and this solo was recorded on Feb 3rd 1967. I first met Jimi on Jan 11th 1967. 2. The actual Octavia used on these first recordings did not have the same circuit, type of transformer or enclosure the wedge shaped pedal in Hendrix display EMP has, as this exhibit was manufactured at least 20 months later. It did however use elements of an electronic configuration that could be considered pivotal. This first unit can be considered as Octavia Evo1."more
"On the left is the Dunlop univibe speed controller, next is a Dunlop 535Q wah. Then my ts9/808, then an old TS-808. Roy is holding a Line 6 delay pedal. Next is a Roger Mayer Octavia. The other box is a switchbox or "snuff box" which allows KWS to kill the guitar signal to the amp and send it to the tuner only."more
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