Fretless and Fretful, How to switch between the two "live"?

[Guest gazzatriumph]

Get a TC electronics RH750/450 which has three presets, job done.

[Chopthebass]

I use a Bassbone with one bass in preamp A and one in B. Then footswitch between the two. Separate gain and three band eq too.

[MoonBassAlpha]

If your eventual solution involves physically unplugging one bass and plugging the lead into the other, i would highly recommend a lead with a Neutrik silent jack on that end. It completely eliminates that nasty buzz and click as you swap over.

[Kirky]

The Gallien Kruger Fusion 550 is a single input but dual channel amp - the switch automatically adjusts gain and eq settings.  Just mute the amp (it has a mute switch of just use your tuner if you use a pedal one) to avoid noice when unplugging.  I think the class d models also have this feature.  They can all be had for £500 or less second hand.

Edited November 5, 2018 by Kirky

[Jack]

The problem with using a BDI21 for this purpose is (as has been mentioned) the BDI imparts a LOT of its own sound and character into the mix. That might suit you, you could for instance have the fretless with the BDI off for a super clean sound and then the BDI for the fretted, rockier, bass sound but you're still limited. I think the BDI has a very limited eq section anyway, I'm just not sure it's the right tool for this job. What's wrong with the trusty old GEB7 as a pure eq pedal? None of the inbuilt 'character' issues that the BDI has and a much more versatile eq section.