FUZZ

"I actually played the lead guitar parts on Spirit, using a 61-62 SG Les Paul, a 68 Marshall Plexi 100w half stack and a home-made overdrive box in front of the Marshall. Regarding the 'beep beeps' as I call them, when the producer asked me to play some fills in between the verses, as a joke I said how about something spacey like this and I did the pickup switch/string bending thing. I saw him stand up in the control booth and he said "that's it! let's record that!" so we did. (There was no slide involved, just my fingers, and I used the bridge humbucker and the pickup switch). The fuzz part is Norman with a built-in overdrive circuit built into his Tele pickguard."
"I've been asked a lot over the years how I did the 'beep beep' guitar parts on Spirit, so for any guitar players out there who would like to learn how, try the following: Using a 2-pickup Gibson, set the neck pickup volume to zero, bridge pickup volume to max, with the pickup switch in the middle position (with Gibson wiring this gives you silence in the middle position). Do a string bend, picking the B & E strings together with one hit, just ahead of the beat, then use the pickup switch to kick in the bridge pickup in triplets (6 per bar) as you let the B string bend down two frets."
"I mainly used two positions on Spirit, which is in the key of A. For the low position, fret a stationary C note (8th fret) on the E string while bending the B string up to an A note for your starting-position, then pick the two strings together once while the guitar is silent and work the pickup switch as you let the A note bend downwards to a G. For the high position, do the same thing at the 15th fret holding a stationary high G note on the E string while bending down from E to D on the B string."