What´s best practice for a sequencer

[Mattias Ericson]

I am building lightshow for my coverband. 

I use a sequenser (I think it is the right term) for the setlist. i.e. I have a gride that starts other grids. Am I making my self clear?

This is in theory my setup 

cell 1 empty because it is dark in the beginning 

cell 2 to grid for song one

cell 3 to grid for song two

cell 4 to grid for song three

cell 5 to grid for song four

and so on. 

I am controlling the powersource via a midipedal and CCscroll. i,e i increase the value X steps for each press. 

This works. But it annoys me because I can´t find the a good round umber for the CC value to hit exaclty the right cell. I tried different solutions, but it all seems to be a gap every now and then. 

Now to my question. What is best practice for the size of the grid, and cc values? Or is there a better way to solve this problem?

Sorry for long explanation in bad english. 

Thanks for all advice I can get. 

Mattias

[Mathieu]

You can use the exact value as received for the CC instead of working with percent by using the midi.controlRaw function instead of midi.control. For example, you can use this formula to control the X slider of your source:

xToPercent(midi.controlraw(1, 1))

With this formula, when the CC value is 0, the source will go to the cell 0. When the CC is 1, the source will go to the cell 1, etc.