How it works

Chords has six "strings", or energy stores, that you strum with the touchpad. Besides the chord and note data, each one carries two numbers: energy and brightness, and those are affected by how you play them, much like string instruments in real life. Everything you do with the touchpad, the triggers and the motion sensors moves one of those two numbers on the strings you hit, and the numbers go out as MIDI.

Energy

Simply put, energy is whether (and how hard) a string is "vibrating", and how much , so strumming or tapping a string on the touchpad when it's silent will start that string's note. A string with energy sounds; when its energy runs out it sends its Note Off. Energy goes out as channel pressure on the string's channel, which is where the MPE stuff gets really fun.

• Playing a string gives it energy. A fast swipe adds a lot, a slow one a little.
• Energy drains over time. Low strings drain slower than high ones by default, about twice as slow at the bottom, so a chord left alone ends from the top down.
• Playing a ringing string adds to it. The string sends Note Off then Note On, and the energy it still had left goes into the new note.
• A finger on the touchpad holds it. While a finger is down the energy on every ringing string doesn't drain. A held face button does the same for the strings it plays.
• Shaking the pad "recharges" every sounding string, raising the output pressure and keeping the note sustained.
• The left trigger pulls it down. How far you pull is how much of the energy is held back, and the pressure drops with it. The last few percent of travel drains the strings, so a full pull sends every Note Off. Ease off and the energy held back goes back in.

How fast energy drains is configurable via the String sustain control, whether the low or high strings drain slower is Energy bias, Dynamics gives you control over how they respond to movement over the touchpad and how they fire when tapped, and Shake response controls how much energy is fed back into the strings by shaking the pad. See Changing the character.

Brightness

Brightness is where on the string it was played. It goes out as CC74, the control most MPE synths map to timbre or slide.

• A pluck or a strum towards the right of the touchpad starts with a higher CC74, towards the left a lower one. Plucks from the right stick and the block chords don't set it, so the string keeps what it had.
• Move a finger along a string on the touchpad's X-axis and that string's brightness will follow, dragging the others with it proportionally.
• The left trigger pulls it down, along with the energy.
• Unlike energy, strings keep their brightness until told otherwise, it doesn't drain on its own.