Overview

Wikipedia defines arpeggio as such:

An arpeggio is a type of broken chord, in which the notes that compose a chord are played or sung in a rising or descending order. An arpeggio may also span more than one octave.

We're using the term arpeggiator a bit loosely here, basically this project turns your NeoTrellis M4 into a little lo-fi synth (or MIDI controller) that plays a sequence of notes with each button press. Each note of the sequence is positioned in relation to the original note pressed, and displayed on the NeoTrellis by lightning up its respective button on the grid. 

All the available notes on the grid are taken from a particular musical mode (similar to a scale), which means pretty much anything you play will sound good. All together, this makes for an unusually fun and visually compelling musical experience - which I affectionately refer to as "Arpy".

You can either have the NeoTrellis M4 generate the audio itself, or have it send out MIDI messages to control another synth over USB MIDI such as on your computer or tablet

Here's what you'll need …

Parts Used

Adafruit NeoTrellis M4 with Enclosure and Buttons Kit Pack

PRODUCT ID: 4020
So you've got a cool/witty name for your band, a Soundcloud account, a 3D-printed Daft Punk...
$59.95
IN STOCK

USB cable - USB A to Micro-B

PRODUCT ID: 592
This here is your standard A to micro-B USB cable, for USB 1.1 or 2.0. Perfect for connecting a PC to your Metro, Feather, Raspberry Pi or other dev-board or...
$2.95
IN STOCK

3.5mm Male/Male Stereo Cable

PRODUCT ID: 2698
Seamlessly transmit high-quality stereo audio with this 3.5mm Male/Male Stereo Cable.  Ideal for "passing the AUX cord,"...
$2.50
IN STOCK

If you don't have a pair of powered speakers, these will work well …

USB Powered Speakers

PRODUCT ID: 1363
Add some extra boom to your audio project with these powered loudspeakers. We sampled half a dozen different models to find ones with a good frequency response, so you'll get...
$9.95
IN STOCK
This guide was first published on Nov 19, 2018. It was last updated on Nov 19, 2018. This page (Overview) was last updated on Nov 20, 2018.