Plan 9 has created music in a wide range of styles. Their scores have been played by the New Zealand Symphony Orchestra as well as leading instrumentalists in both classical and contemporary music. Between them they play double/el bass, guitars, mandolin, banjo, violin, trumpet, euphonium, trombone, marimba, keyboards, Indian harmonium and biscuit tin guitar.

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Experimenting with extended techniques and doing so much recording lead them to develop and create their own original Virtual Instruments for Kontakt under the brand MODWHEEL.