Dudes tell me please what SPEED and ADD parameters do? and how they need to be set?
Speed sets the speed of the snake in the game… 
But for real… Speed is the song speed. A lower number actually makes it faster, due to less “ticks per line”. Add is probably how many rows the cursor jumps after you insert a note. For example a setting of 1 goes to the next line, if you set it to 4 you could go to each 4th line to put for example a bass drum for a house beat… Etc.
Seeing Skale tracker is a blast from the past. I never used it much but I’ve done some experimenting with it. Probably the coolest thing about it was the online version. But I think that’s gone now?
Anyway… Good luck!
Add is probably how many rows the cursor jumps after you insert a note. For example a setting of 1 goes to the next line, if you set it to 4 you could go to each 4th line to put for example a bass drum for a house beat… Etc.
Yes, I can confirm: ADD is the same as “editstep” in Renoise.