Reply to Simple midi controller help

Hi Guys,

I'm trying to build a simple little project and thought you might be able to give me some pointers, new here. I did some searching and couldn't find anything quite as simple as I'm looking to do.

Here's some specs:

- Class compliant, bus powered (USB) midi controller board (Arduino? Teensy?)
- 4 analog pot controls.
- Traktor compliant / mappable.

That's it

I'm looking for the simplest, most solid concept. Was looking through Arduino documentation and wasn't sure if you can do USB bus powered and if it will work with Traktor simply?

Any help GREATLY appreciated!