Ten canisters of pressurized tetrafluoroethane over three weeks (ALKU 89, 2009, 7" horn-red vinyl).
Two pieces for hand-held gas horns realized at the Music Research Centre, University of York, November 2008.
Acknowledgements: Anna Ramos, the Fell family, Joe Gilmore, Mat Steel, Heather Hughes, Paulo, Jenny's Fish & Chips, and especially everyone at York's New Aesthetics in Computer Music programme.
In November 2008, Roc Jiménez de Cisneros was invited to do a residency at York University's Music Research Centre, as part of the New Aesthetics in Computer Music programme. Over the course of three weeks, and with the kind assistance of the MRC personnel, he recorded several hours of gas horn sounds with high-end microphones and a custom built rig – a microphone suspended from a giant hand-operated pendulum at the MRC Rymer auditorium.
Each section features up to 3 simultaneous horns played with different techniques to modulate their pitch, harmonic content or amplitude. Some of these methods are meant to be purely physical renditions of classical synthesis techniques, e.g., two opposed horns blasting air into each other to emulate amplitude modulation.
On average, commercial gas horns produce a tone around 440 Hz (also known as the Concert A, that serves as the standard for musical pitch.) Some of the Marco™ horns used here were prepared with a fast-setting epoxy polymer compound to change their aperture.
1,1,1,2-Tetrafluoroethane is a haloalkane refrigerant with an ether-like odour. It has the formula CH2FCF3, and a boiling point of –26.3 degrees centigrade. Tetrafluoroethane is the main component in many brands of gas horn canisters.
'Ten canisters of pressurized tetrafluoroethane over three weeks', the first totally acoustic release in EVOL's ongoing Punani series, contains several excerpts from the MRC sessions, totally unaltered, without further computer processing, electronic effects, or overdubs.
Play loud, at 45 RPM!!!