GUEST of 10 Nov 11 - 07:36 PM was me. I hadn't realised my Cookie had disappeared into the ether as such things are wont to do from time to time.

I believe that 17 key Northumbrian pipes are fully chromatic.

A shruti box will work with your melodica and might be more effective than messing about with foot pumps etc. It is possible to work the shruti box with your feet leaving both hands free to play the melodica or, alternatively use one hand for each if you are playing just melody on your melodica. I have used shruti box and harmonica in that way and that works fine.