Neovibe biasing question...yes, I searched

[Filament]

I'm just confused on which pot has to be turned down all the way when biasing the neovibe lamp.  The literature I've read says it's the amplitude pot but I don't know for sure if that means volume, depth or speed.  Amplitude makes me think volume but that doesn't seem to make too much sense.  I swear I did search the archives before posting.

Thanks in advance.

[Auke Haarsma]

I'd  say amplitude=depth.

[R.G.]

Yes, depth. You don't want the LFO wiggling the bulb around while you're trying to set its resting position.