It's rare that every single track of an album contains a masterpiece bass line. This is one of them.
There are two narratives that surround playing this particular track:
1. Flea tunes the entire bass a half step down.
2. Flea tunes just the E string down a half step.
1. I contend that Flea does not tune down a half step at all. In the performance of this song at Slane Castle, at 3:43, you can clearly see him fretting the eighth fret for the outro. If the bass was tuned a half step down, he'd have to fret the ninth fret to get the correct pitch.
2. If you listen to his isolated bass track and slow down the tempo, play an open E on your bass at the same time Flea plays his open E, and you'll find both tones match.
Flea doesn't tune down at all.
There are two narratives that surround playing this particular track:
1. Flea tunes the entire bass a half step down.
2. Flea tunes just the E string down a half step.
1. I contend that Flea does not tune down a half step at all. In the performance of this song at Slane Castle, at 3:43, you can clearly see him fretting the eighth fret for the outro. If the bass was tuned a half step down, he'd have to fret the ninth fret to get the correct pitch.
2. If you listen to his isolated bass track and slow down the tempo, play an open E on your bass at the same time Flea plays his open E, and you'll find both tones match.
Flea doesn't tune down at all.