~to produce an interactive installation where people could
play chords which represented the different resistances of
a group of pieces of fruit infested with fruit flies.
According to the project documentation, resistance is
sometimes used as a measure of fruit quality[12].
" Teaching interface design at the Queen Mary
University. One of the vehicles for learning is a musical
instrument based on an electric guitar, exploring
ergonomics with digital and analog inputs to a Mozzi
synthesiser[13].
" B.O.M.B.-Beat Of Magic Box-, a palm-sized
interactive musical device by Yoshihito Nakanishi,
designed for cooperative performance between novice
participants. The devices communicate wirelessly and
produce related evolving harmonic and rhythmic
sequences depending on how they are handled[14].
" MIDI-based synthesisers using Mozzi as a synthesis
engine. One example is ^ [xor] synth by Viclav
Pelousek, founder of the Standuino hand-made electronic
music project, with six voice polyphony, velocity
sensitivity, envelopes, selectable wavetables, modulation
and bit-logic distortions[15]. Others include Arduino
Mozzi synthesizer vX.0 by e-licktronic, a mono synth
with selectable wavetables, LFO and resonant filtering
[16], and the ironically humorous FM-based CheapSynth
constructed and played by Dave Green and Dave Pape in
a band called Fakebit Polytechnic[17].
My own sound-sculptural object exhibited at PICA
during ICMC 2013 also uses Mozzi. This is a small solar
powered sound-generating object which responds to
changes in solar energy with 6 voice polyphonic audio
synthesised in real time.
8. THE FUTURE OF MOZZI
Mozzi is relatively young yet ripe for a community of
open source development and practice to emerge around
it. It's easy to write new classes and to construct
composite instrument sketches. Feedback from educators
has shown that the library is able to be used by children.
There is the potential for porting the library to new
Arduino platforms as they become available. As it is,
there is already a long to-do list, including a variety of
half-finished sound generators and instruments, and the
ever-receding lure of creative work beyond the making of
the tool.
Mozzi expands the possibilities for sonification and
synthesis in new contexts away from expensive hardware,
cables and power requirements. The low cost and
accessibility of Mozzi synthesis on open source Arduino
and compatible microprocessors offers people a way to
create applications and compositions adapted to a wide
range of localised conditions.
9. REFERENCES
[1] teckel, "toneAC v1.2 - Twice the volume, higher
quality, higher frequency, etc.", Online posting.
January 31, 2013. Arduino Forum:: Using
Arduino:: Audio, Retrieved 7 Feb 2013,
http://arduino.cc/forumindexphp?
P1PSESSID-b479b487efable2ac9fc7a52d4561
6cd&topic=142097.45
[2] Marshall, J. Arduino Octo-Synth, Retrieved 7
Feb 2013, http://wxww.cs.nott.ac.uk/~ign/?p=605
[3] Nawrath, M. Arduino Realtime Audio
Processing, Retrieved 7 Feb 2013,
http:/interface.khm.de/indexphp/lab/experiment
s/arduino-realtime-audio-processing
[4] Land, B. Fixed Point DSP functions in GCC,
Retrieved 7 Feb 2013,
http://p)eole.ece.cornell.edu/land/courses/ece47
60/Math/avrDSP.htm
[5] Audrey, S. Glade, Retrieved 7 Feb 2013,
http://code.goole.corn/p /lade/
[6] Barrass, S. and Barrass, T. SweatSonics,
Retrieved 7 Feb 2013,
hittp://steohenbarrass.word iress.comtag/sweatso
nics
[7] Vercoe, B. Csound - A Manual for the Audio
Processing System and Supporting Programs
with Tutorials, Media Lab, M.I.T., 1993
[8] Puckette, M. S. "Pure Data", Proceedings,
International Computer Music Conference, San
Francisco, USA, 1996.
[9] Barrass, T. Output circuits, filters, amplifiers,
etc., Retrieved 7 Feb 2013,
htt s://,ithub.con/sensorium/Mozzi/xwiki/Output
-eircuits filters -anplifiers.-etx -%28*-this-hascontent%29
[10] Barrass, T. Mozzi API, Retrieved 7 Feb 2013,
htt://sensoriumn. ithub.omn/M'ozzi/dioc/htmnl/ind
ex htm l
[11] Barrass, T. Mozzi Sound Synthesis Library for
Arduino, Retrieved 7 Feb 2013,
htt:/sensorium. ithub.com/Mozzi/
[12] Freeman, C. Untitled Sound Project Two,
Retrieved 7 Feb 2013,
http://reprage.com/'ost/28654178439/untitledsound- roject-two
[13] McPherson, A. Build Your Own Arduinitar,
Retrieved 10 Jun 2013,
http: //wwweecsgcmulac uk/~andrewm/ard inita
r.htmil
29 2013 ICMC
