1973 Fender Jazz bass + Fender Rumble Stage 800 amp. DI out to GarageBand.
The live recording used a synth bass. To try to get a similar sound, added some pre effects to the bass amp setting:
1) “Pedal Shift” which shifted the pitch down one octave.
2) “Triangle Flanger” which was set to the max level with a low rate and a medium phase.