You would input each step in the sequence with the option to how many semi tones would be triggered above or below the key that triggers it , and then would be activated by which keyboard key you would press or program.
Working example.
16 steps, select steps 3.7.8.13.
Set steps 3 & 8 to play 2 semi tones above the key to trigger the sequence. Press key C, the sequence would start at step 1,but not sound until it reaches step 3 which would then play a D, steps 7 & 13 would still play the C, and step 8 would sound a D again, the unselected steps would not generate any sound .
Then depending on what key is pressed, dictates to which notes are sounded.
Hope that makes sense.
