Archive for the ‘Gestrument’ Category

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”

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.

contemplating captivity

Wednesday, July 27th, 2016

S0602654crop

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

Its a Queer Time (a microtonal setting of a Robert Graves poem)

Tuesday, April 19th, 2016

Its a Queer Time, a setting of a poem written by Robert Graves and read by Pete Marchetto from librivox tuned in 22 edo, 11 edo, and 43 JI running on 8 different synths. The technology behind the audio is using Gestrument as a performance controller and transmitting its midi output over ethernet using rtpMIDI (thank you Tobias!!) as a Windows surrogate for Apple Bonjour – the end result is that I play the Gestrument on my iPad and Sonar sees the midi from it as a virtual midi controller. Then it is simply a matter of routing each midi channel to separate tracks each with a microtonal aware synthesizer [panned a bit uniquely] – the audio was then added, the midi tracks trimmed appropriately and then married to the video. Since the video and Librivox licenses are public domain by necessity my musical setting of these resources is public domain as well.

For Quincas Moriera – the long version of the music.

Loosely Controlled Variations

Monday, April 18th, 2016

S0413364crop Picture by Chris Vaisvil


Loosely Controlled Variations is a short piece created by using scalegen to create a file for 17 edo tuning for Gestrument and then performing on the Gestrument a mix of 17 edo with just a little 12 edo.

Melodyne pitch set analysis of this piece

Melodyne scale analysis of this piece