I believe I have the correct note mapping to program the BeatStep pads to match the pads on iSpark. Aside from everything I read going into this project, give it a try and post any improvements. I have not tackled the knobs yet, so ......
Use Midi Note and Gate (Channel is up to you, but must match the setting on iSpark)
Starting with pad 1 through 16, 1=C3, 2=C#3, 3=D3 --->12=B3 .... 13=C4, 14=C#4, 15=D4, 16=D#4