Muso64:
Fair comment but how and where to purchase? As you said these clones are sold under the Auduino banner which is illegal. How doe's one deduce which is legal or not? Me I want the quality of a known product.
Either buy them from the online Arduino store directly, or from one of the official resellers. (Note that it's called Arduino, not Auduino.)
Muso64:
The teensy is too small for I me thinks! Which auduino is the easiest to connect to mechanically/electrically? Can a pin/socket arrangement be used or breadboard headers? How do you connect the auduino to in out pins etc?
Teensies being smaller than Arduinos is not really a problem, in my opinion. In many cases, it's actually an advantage. As mentioned before, the size and distance of the pins is exactly the same as any other Arduino.
You can use male Dupont connectors to connect wires to a normal Arduino. For breadboard-friendly Arduinos, such as the Micro, or Teensies, you can plug them into a breadboard for prototyping, or use female Dupont connectors.
Some Arduinos are available without any headers, so you can solder the wires directly to the PCB. This is great for the final version of your project, but not for prototyping, as soldering is pretty permanent.
Female headers + male Dupont connectors tend to come loose after some time (due to vibrations, shaking the device ...). Hot glue or tape helps, but I still prefer soldering my final product.
Muso64:
Peiter the example code. Is it ready to go? Is there more for me to learn?It seems to me that all I need to change is analog cc no's?
Is it really that simple?
Yes, it should be ready to go.
If you were to write everything from scratch, it wouldn't be that simple, of course. Once you get everything working, and you are a bit more familiar with C++/Arduino, you can check out the actual implementation of the different classes in the MIDI Controller library: for example, the Analog class or the Digital class.
Pieter