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Improvisation (trombone with computer effects)

by Simone De Haan and Greg Schiemer (1985)

Audio Sample

Performance by Simone De Haan, Greg Schiemer from the CD Anthology of Australian music

Anthology of Australian music

Out of Print

This item is out-of-print. We regret that it cannot be purchased from the Australian Music Centre.


Anthology of Australian music : de Haan, Schiemer, Vine, Leak.

Library shelf no. CD 54 [Available for loan]

Work Overview

This recording is an improvisation by Simone de Haan (trombone) and accompanied by some of the sequenced instruments of the Tupperware Gamelan, a collection of purpose-built battery powered instruments which I began to build in 1977. It consisted of analogue electronic hardware mounted in plastic kitchenware. The instruments were initially intended to be played by an ensemble of non-expert performers and in 1980 included a set of mobile sound sources called UFOs which produce the Doppler effect when they are swung on the end of a cord. In 1983, these were modified so they could be sequenced using a purpose-built pseudo-random sequencer and used as sound and visual props for the One Extra Company production of Porcelain Dialogue performed at Sydney Opera House, Melbourne Playhouse and Canberra Theatre. This recording made with remnants of the modified UFOs of the Tupperware Gamelan was made in 1985

Work Details

Year: 1985

Instrumentation: Trombone solo, purpose-built (pre-MIDI) hybrid analogue-digital hardware consisting of: 16 sequenced oscillators, each mounted in a self-contained hanging  demultiplexer-oscillator-amplifier-loudspeaker unit. 1 pseudo-random sequencer-multiplexer implemented using digital CMOS shift registers and exclusive-OR gates with digital feedback controlled by binary switches

Duration: 6 min.

Difficulty: N/A - Not for live performance

Live-performance electronic music produced using purpose-built hybrid analogue-digital instruments pseudo-random sequencer is based on early circuits of Joel Chadabe, Aardvark synthesiser of Warren Burt and Patent Little Marvel of Carl Vine.


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