Archive for the ‘iOS Device’ Category

Geoshred iPad app suite in native Just Intonation

Tuesday, September 19th, 2017

music and video by Chris Vaisvil

audio only

BitWiz Harmonic Series Code

Saturday, May 6th, 2017

BitWiz is a $0.99 app that lets you run single line C code music generation algorithms. I used it to perform this piece by selecting code in sequence and using the X-Y manipulation when it was a part of the code. This software from Kymatica is for the iPad. The analysis shows that at least the first section is clearly non-12 equal. I didn’t analyze the rest, however, it seems to me to be almost next to impossible for a single line of code to generate something as unnatural as 12 equal.

Click the picture to enlarge the Melodyne analysis of section 1 or the spectrum analysis of the Gong piece below.

As a bonus For Gongs, Bow, and Super Balls with Effects

Droneo – the $2.99 microtonal iPad (video)

Sunday, February 12th, 2017

click to see app store description

The Tempest Prognosticator

Saturday, December 31st, 2016

In 24 edo (largely) using Shoom, Gestrument, and Bowls HD => download

The tempest prognosticator comprises twelve pint bottles in a circle around and beneath a large bell. Atop the glasses are small metal tubes which contain a piece of whalebone and a wire connecting them to small hammers positioned to strike the bell. In his essay Merryweather described the workings of the device:
“ After having arranged this mouse trap contrivance, into each bottle was poured rain water, to the height of an inch and a half; and a leech placed in every bottle, which was to be its future residence; and when influenced by the electromagnetic state of the atmosphere a number of leeches ascended into the tubes; in doing which they dislodged the whalebone and caused the bell to ring. ”
— George Merryweather

The leech would have difficulty entering the metal tubes but would endeavour to do so if sufficiently motivated by the likelihood of bad weather. By ringing the bell it would signify that that individual leech is indicating that a storm is approaching. Merryweather referred to the leeches as his “jury of philosophical councilors” and that the more of them that rang the bell the more likely that a storm would occur.

In his essay Merryweather also noted other features of the design, including the fact that the leeches were placed in glass bottles placed in a circle to prevent them from feeling “the affliction of solitary confinement”

Demo of Shoom, a Microtonal iPad App

Thursday, December 29th, 2016

I take trip through Shoom after Keenan Lawler mentioned it, and I found I actually had it installed. It is a superb microtonal aware synthesizer that is also a controller. My tour is a bit leisurely and only goes into a bit of what this program can do. It is highly recommended. It was $5.99 when it was first released, currently I believe the app store price is $9.99 – still quite affordable. The noise you hear in places are the actual (and unusual) preset settings of the app.

Microtonal Gestrument Demo Video

Tuesday, December 27th, 2016

A video demo of the Gestrument, an algorithmic music composition iPad program that supports alternate tunings. It works hand in hand with ScaleGen (not shown here) for $13.99 bought as a bundle. Its a great value and has a long list of features such as morphing of tunings, recording, a nice selection of voices and output of midi.


Saturday, August 6th, 2016


Tobruk – a short solo piece using the iOS app Geoshred

contemplating captivity

Wednesday, July 27th, 2016


contemplating captivity for string orchestra, percussion and prepared pianos in 17 note per octave tuning

How to import scala tuning files into Z3ta+ (Zeta) for iPad

Monday, June 6th, 2016

Z3ta+ downloads with a number of alternate tunings. Of course it won’t have your latest tuning or inexplicably developers leave out traditional equal tunings like 17, 19, 22, 31 notes to the octave. And it isn’t obvious how to add new tunings to the application. So what follows is a step by step.

Launch iTunes, attached your iPad and then obtain this view

Then scroll down the page until you see the list of apps that allow transfer of data via iTunes file sharing

Select z3ta+ and click add file… and select your desired scala tuning files

When done you will see a list of scala files staged for import. Click sync to transfer them to the iPad.

When the sync is done z3ta+ will acknowledge the transfer

And you can go into the options / tunings and see your files have indeed transferred and are ready to be used.

Ask For It (over the ridge)

Saturday, April 23rd, 2016

S0710929crop Image by Chris Vaisvil

Ask For It (over the ridge) is a “pop” music composition in Bohlen-Pierce tuning. It was made using an iPad and Sonar for a total of 4 Z3TA+ instances (iOS), one of Sector (iOS).