If you watch the Fort Worth gig on the recently released Some GIrls DVD you can see Mr Richards using two capos on JJFlash I think. Not sure as to why he is doing this as he usually only uses one on that song.
Probably because he was afraid having to re-tune his guitar after removing his original capo. By adding the second one, the guitar wouldn´t get any tuning problems...
Quote GravityBoy Maybe it's because of sympathetic ringing behind the first capo?
I wouldn't have thought that would be picked through the amp though.
No, I can't understand why it would be used on an electric, no doubt one of our learned friends will be along soon to clarify the matter. Maybe it did something to the string tension and thereby gave a different feel/sound?