In my last post, I mentioned that I had switched over to the iOS. I started playing around with GarageBand and I found that the live loops are good for jamming with. I plugged the iPhone directly into my audio interface with my keyboard and got the live loops running. In the video I am improvising on the keyboard to the live loops.
Listing to the bass lines on the live loops, I could work out that the key is G minor for most of the beats.
Incidentally, I connected the iPhone 7 Plus directly into my Steinberg Audio interface using via the Lightning to 3.5 mm adapter. I then used a 3.5mm to 1/4 inch stereo cable.