What Drone Machine do you recommend me?
I already try the Drone Lab, the Sleepdrone, and see video about the Grendel Drone commander.
I use these two:
D.R.A.R.T drone generator:
http://www.youtube.com/watch?v=f1t1WssPOkA&feature=youtu.be
CY 808: http://www.youtube.com/watch?v=KS1owfyzFdI
I have the second prototype of this. Now it is offically part of the lumanoise family:
http://tonylight-leploop.blogspot.it/
I was recently playing with some software drone boxes on my phone. Tanpura Droid is great as you can get it to oscillate and play forever. There were a few other tone generators as well that were free or of nominal cost that were fun to dick around with and could make for interesting performance / recordings.