Isolated bass: John Paul Jones, part 2

[Raman]

Probably my favorite rock bass line of all times. Like an archetype deep in my psyche.

 

[bassdude51]

One of the greatest bass players of all times and only about 23 years old when Zep start out. But, he was also a professional musician and secessions man.

His lines blow me away. Flat wound strings? You bet!

 

[Michedelic]

Was it ever verified what the modulation was? It doesn’t sound like straight tremolo or a Leslie to me, plus there’s a bit of overdrive going on. Since Page would use a Vox AC-30 in the studio, and those feature a vibrato circuit(which is a pitch variant, as oppposed to tremolo, an amplitude variation), I wonder if Jones was going through one of those, as I hear a frequency warble.

 

[Raman]

Was it ever verified what the modulation was? It doesn’t sound like straight tremolo or a Leslie to me, plus there’s a bit of overdrive going on. Since Page would use a Vox AC-30 in the studio, and those feature a vibrato circuit(which is a pitch variant, as oppposed to tremolo, an amplitude variation), I wonder if Jones was going through one of those, as I hear a frequency i

I believe it's due to an oscillating Leslie speaker.