What is the TOOL? it is the next step for the GRAINS, where the GRAINS was designed to be an audio source, the TOOL is made for CV signals (but can generate 12 bit audio as well).
and many more!
Here is the first box with handy tools made by Kassen to fill your TOOL: Toolbox
Some MAC users came across some difficulties. Here is how to upload your code on a MAC (we have tested it on a MAC running OS X El Capitan 10.11.6)
Also check thishttp://kig.re/2014/12/31/how-to-use-arduino-nano-mi PDF where the most important info is copied:
How to install the driver on a MAC