Button Feedback

Let’s start with the basics. What will we need to take as input, and what should we be outputting?

I want to take a modular approach so these are reusable, and keep things flexible so they can be used with other devices if possible.

Input

• Device: The device we are controlling
• Channel: The MIDI channel we are listening on and sending to
• Control: The MIDI note/CC on that channel

Output

• Result: A Boolean value representing the button state
• Output: Passes the MIDI data down to an execute operator

Trigger Button

Functionality: When the button is pressed, it sends a single positive pulse to the result and to the MIDI channel and CC/note number of the APC40.

Explanation: The MIDI input’s `WasHit` is connected directly to the MIDI output. This allows the pulse from `WasHit` to also light the button. `WasHit` is passed as a Boolean `Result`.

Toggle Button

Functionality: When the button is pressed, it toggles between the on and off states and outputs that state both as the result and to the APC40.

Explanation: From the MIDI input, count every time `WasHit` is triggered. If the counter is even, send a positive value to the MIDI output and result. Set the default value on `CountInt` to `1`, since `IfIntEven` should start in an off/false/odd state. Set the modulo on `CountInt` to `2` so the counter flips between `0` and `1`.

Hold Button

Functionality: When the button is pressed, it continuously sends a positive value as the result and to the APC40.

Explanation: Convert the MIDI input float to an integer using `FloatToInt`, then convert the integer to a Boolean using `IsIntEven`. Since the on state of the float is `1`, this is an odd number, so invert the Boolean using `NOT`.

What might we need to extend?

• Define the color of OFF states
• Define the color of ON states