I’ve just completed a project which details how to control the Pimoroni Unicorn Hat Mini using Sonic Pi It includes full details of the software required and how to set it up.

You can read it here.




Two posts on using Sonic Pi with midi, (qsynth) and OSC controls

After quite a gap, I’ve at last got around to writing two further articles, for those interested in usingThe first article explains how to set up Qsynth with Sonic Pi on a Raspberry Pi or linux based computer running Sonic Pi. Unfortunately, for Raspberry Pi you need to install your own version of Sonic Pi built from Source, as the version currently supplied with the latest Raspbian Buster dated 2019-09-26 although built from Sonic Pi 3.1 source, does NOT include essential elements necessary for Midi or OSC communications to work.
I hope to publish details on building version 3.1 for Sonic Pi shortly, together with a bundled download that will let you install it, although not a full blown debian package which is difficult to build.

The first article details how to to install and connect Qsynth to Sonic Pi, tested on a full Sonic Pi 3.1 version running on a Pi4.

The second article details various techniques using OSC messaging to control various aspects of the Sonic Pi, like altering effects, volume, pan settings, samples playing in real time. This uses the TouchOSC application available for IOS or Android phones and tablets to send the control signals. This article applies to Sonic Pi running on Mac or Windows as well.

Sonic Pi controls Spirograph – version 2

I have made some changes to version 1 which makes the program more flexible. The main change is that it is now possible to re-run the Sonic Pi program (now named spiroAuto.rb) which will abort the drawing currently in progress and start drawing a new design. This make it possible to change to a new drawing without having to wait for ` drawing to finish.
Also, instead of just having a few pre-chosen drawing parameters in the program, I now generate the parameters at random (with certain constraints), which means that you can continuously call up new designs. Thirdly I have added an option which changes the plot colour of a drawing to a random value at periodic intervals while it is drawing. This is set to a fairly low probability by line 34 in the spiroAuto.rb program


To adjust the probability simply change the section


to give change the ratio of “true” to “false”. e.g. changing the overall line to


would give equal probability to random colour changes or fixed colour drawing.(random when true, fixed when false). Similarly you could give a larger selection of fixed colours in the first part of the list if you wish.

To make the program easier to install, I have put the code into a repository in github at
From there you can download the repository to your computer, and set it up ready to go following the instructions in the file

A video of the new program in action can be found here

Sonic Pi Glockenspiel MkII

I have just completed and published a second version of my Sonic Pi driven Glockenspiel

This version uses overhead hammers, and is more adaptable to work with a wider range of Glockenspiels. I set it up with a Plus Percussion PP1130 13 note Glockenspiel, which also has the facility to change certain notes so that it can play in C major, F major or G major. The article I have written contains constructional photos full circuit and software details and a link to a video of the working system.

Article is here