Some useful uses for Transform is for creating triggerable actions, like I’ve seen one MIDI keyboard lacking proper Transport controls (start, stop, continue), so it’s possible to workaround that by making some pads produce these messages.
Another interesting use would be to use Transform together with Sync Delay, so Transform converts some trigger message into Start, sends it to Sync Delay pipe to produce or drop Clock to nudge the pattern forward or backward. Similar technique can be used to manually trigger Arp steps, or even mess around with synced pipes like LFO or Delay, but not sure how useful that is in practice.
As Transform is such a versatile pipe, I think it would be useful to have a Deep Dive ( maybe borrow the Minibrute “CookBook” language?) which would show eachother in-context transformations that we might not think of by ourselves.
16 Levels is a feature of Akai MPC hardware and other pad-based samplers. It allows you to play a single sample, like a hi-hat, at 16 different velocity levels from the 16 pads. It allows for easy live input of percussion patterns with accurate and consistent velocities.
My patch allows me to do the same across 2 octaves of a MIDI keyboard instead of 16 pads.
This patch uses Transform to:
Change all incoming note numbers to C4, the base note of the sample
Change the note velocity to the note number
Then it uses Rescale to scale the velocity from a range of 60-84 (the low/high notes of the 2 octaves) to 0-127. Anything played below note 60 plays velocity 1. Anything above note 84 plays velocity 127.
To change which base note the keys play (if your sample base note is different, like C3) you would change Argument 1 (C4) in Transform.
To change which 2 octaves (or more, or less) control the velocity levels you would change the In Low (60) and In High (84) values in Rescale.