The author's close connection to traditional Alaskan culture has inspired the creation and implementation of new multimedia instruments based on the use of ritual objects in shamanic cultures of the far north. Simultaneously, the musical processes articulated by this music are structurally tied to environmental systems in a technique discussed here as ‘ecoacoustics’. In this work, performer/composer interaction, musical composition theory, multimedia performance, and musical instrument design have been transformed in response to these influences.

I only went out for a walk, and finally concluded to stay out till sundown, for going out, I found, was really going in.John Muir (1913)This article describes several recent projects that together illustrate an evolving practice and a philosophy of ecoacoustic sound art called EcoSono. These projects foreground adventure – the live, in-person engagement with the world. As a technological sound art practice, EcoSono uses technology to link human and environmental expression, in an attempt to define a collaborative and symbiotic relationship between humans and the natural world. At the core of this work are computational and transduction technologies enabling deeper human–environment interaction. This paper describes three projects including the MICE (Mobile Interactive Computer Ensemble) World Tour, the EcoSono Institute music/science collaboration adventure, and the Agents Against Agency series in emergent and improvised musical forms. The article also addresses several key values of interactive ecoacoustics. First, it describes the importance of ‘impracticality’ in creating a productive environmentalist art work. The article also makes the case that the purpose of outdoor recording is not the acquisition of material samples, but to hear the world and learn from it.

The Metasaxophone is an acoustic tenor saxophone retrofitted with an onboard computer microprocessor and an array of sensors that convert performance data into MIDI control messages. The instrument has additionally been outfitted with a unique microphone system that allows for detailed control of the amplified sound. While maintaining full acoustic functionality it is also a versatile MIDI controller and an electric instrument. A primary motivation behind the Metasaxophone is to put signal processing under direct expressive control of the performer. Through the combination of gestural and audio performance control, employing both discrete and continuous multilayered mapping strategies, the Metasaxophone can be adapted for a wide range of musical purposes. This paper explores the artistic and technical development of the instrument, as well as new conceptions of musical mappings arising from the enhanced interface.

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NOMADS (Network-Operational Mobile Applied DigitalSystem) is a network client-server-based system for participant interaction in music and multimedia performance contexts. NOMADS allows large groups of participants, including the audience, to form a mobile interactive computer ensemble distributed across a network. Participants become part of a synergistic interaction with other performers, contributing to the multimedia performance. The system enhances local performance spaces, and it can integrate audiences located in multiple performance venues. Individual user input from up to thousands of simultaneous users across a network is synthesised into a single emergent sound and visual structure in an approach we call socio-synthesis. This paper recounts research leading up to NOMADS, outlines its technological architecture, and describes several implementations. Current applications include the telematic opera Auksalaq, and performances by the MICE Orchestra. The authors also consider the potential of large-scale human-computer ensembles as a paradigm for composition and performance.