# Polyphonic gated synth for Sonic Pi 3, works on a Pi3

**URL:** <https://in-thread.sonic-pi.net/t/polyphonic-gated-synth-for-sonic-pi-3-works-on-a-pi3/452>\
**Category:** Creations & Ideas\
**Created:** [November 23, 2017, 2:03pm UTC](https://in-thread.sonic-pi.net/t/polyphonic-gated-synth-for-sonic-pi-3-works-on-a-pi3/452 "2017-11-23T14:03:36Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![robin.newman](https://avatars.discourse-cdn.com/v4/letter/r/76d3ee/32.png) [@robin.newman](https://in-thread.sonic-pi.net/u/robin.newman)\
**Post date:** [November 23, 2017, 2:03pm UTC](https://in-thread.sonic-pi.net/t/polyphonic-gated-synth-for-sonic-pi-3-works-on-a-pi3/452/1 "2017-11-23T14:03:36Z")

</div>

Last August I published a program which gave an 8 note polyphonic gated synth for Sonic Pi. It was resource hungry and only worked on a powerful computer, and wouldn’t work on a Raspberry Pi3. Now, following on from a thread [here](http://in-thread.sonic-pi.net/t/using-pitch-change-and-control-change-from-midi-controller-roli-lightblock/435) I have developed a simpler version which works well on a Raspberry Pi3 with Sonic Pi 3 and suitable midi input controller/keyboard.  
There is a full article

> **[revised simpler polyphonic gated synth using Sonic Pi 3](https://rbnrpi.wordpress.com/2017/11/23/revised-simpler-polyphonic-gated-synth-using-sonic-pi-3/)**
>
> further simplepolysynth2.rb version added to the code link for this article for use with keyboards with separate note\_on note\_off midi commands, rather than those using note\_on with velocity 0 for …

  
and an accompanying video  

[![](https://img.youtube.com/vi/XYciYPLfgXI/hqdefault.jpg "Sonic Pi Pi3 Midi Polysynth") ](https://www.youtube.com/watch?v=XYciYPLfgXI)

You can download the code [here](https://gist.github.com/rbnpi/ebedd26d61180230db891ccbd9d74971)