Okay, so I accidently deleted everything here LOL
*Warning, I kinda jumped around in writing this, but I still like the information I wrote, so I will leave it - just excuse the redundancy.*
Once again.
It seems like the Kaoss Pad 3 and the Kaossilator Pro are your top choices. They both function using internal and external audio information, but they do it differently. I would assume you want the Kaossilator Pro over the KP3 because the Kaossilator tends to work off of internal sounds, while the KP3 seems to function more on taking external sounds and using those sounds and doing sampling by those means.
This first video does a side by side by Korg Rep. Probably the most informative video on here. (My second favorite is the KP3 Video 1 link... that is just dandy on so many levels... check it out!)
The Kaoss Pad 3 is a great great great tool, it seems more like a loop, record, and layer machine.
You can hook your bass up to it, play a line, and have it looped and recored over and over. You can than layer more bass lines and such and than tweak the overall sound. This is cool if you are doing solo work, but can be too much for a band setting. It also has a vocoder that allows you to speak through it and use those effects. I am currently searching if you can use this device as a live effects box and be able to get certain tones using it without having to record over it and than mess with it.
Video 1: This is absolutely amazing - mostly because this dude is friggin hilarious. I highly recommend looking at this one for a quick preview and a good laugh.
Beardyman using Korg's kaoss Pad 3 - YouTube
Video 2: This is what can be done with just a bass using the loop, recording, and layer feature.
bass guitar vs kaoss pad 3 - YouTube
Video 3: This video demonstrates how it can be used in a more simple fashion and gives you an idea of its main functioning abilities.
KORG Kaoss Pad KP3 - YouTube
Kaossilator Pro - This is more of an on the spot build from scratch synth processor.
Video 1: This seems like a lot to handle on stage as you play bass, so it seems like a deterrent. However, from the the way I see it, I imagine you making the loop using the synth aspect, and then just trigger it by one of those pads.
KORG KAOSSILATOR PRO - YouTube
Video 2: It would appear that you can hook your bass into the Kaossilator Pro and use it for live effects. However, this dude uses his feet, and I do not know what he is doing with them as he uses the effects on some of those instruments.
Kala U-Bass Ukulele, Korg Kaossilator Pro, Orange Bass Amp - YouTube
Video 3: This video demonstrates a good use of the bass with the Kaossilator Pro by recording, looping, and using the synth effects that do some live work.
Kaossilator Pro + Bass Guitar - YouTube
The Kaossilator is a simpler version of the Kaossilator Pro (Obviously). It seems like it just focuses on the synth sounds, gate arpeggiator (bpm for the gate arp) and a bit of looping.
Kaossilator - YouTube
The possibilities are so great with these items, but in my opinion, I think you would be better off with the Kaossilator Pro, but that is for you to decide cause only you really know what you want to try.
My store has the Kaossilator Pro online for $400.00. In store (plus shipping) it is 360.00 (I do not know shipping price - but I cannot imagine it being $40.) [But we do not have one currently in stock, although we are always able to order them - just as long as Korg is able to send them.) [Invalid or Expired Link Removed]
KP3 is 360.00 online and 320.00 (Plus shipping) in store. (There is one in stock).
[Invalid or Expired Link Removed]
Kaossilator is 160.00 online, and 150.00 in the store (Plus shipping)
Good luck with your choices!!!!