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Transcript
sensors for new musical instruments Roberto Aimi typical controller system • sensors • acquisition system (Icube, PIC, Basic Stamp) • mapping software (Max, PD, ?) • output(?) useful resources • Fraden, a handbook of modern sensors • MSI piezo manual • acroname.com, infusion systems ($$$!!!!) • Datasheets! other favorite resources • Digi key • American science and surplus • smallparts.com • Mcmaster-Carr / MSC industrial catalogs what to sense? • position, velocity, acceleration, rotation • temperature, light, sound • pressure, torque, bending • ON/OFF •? Switches • discrete output • toggle, normally on, off • can provide visual and tactile feedback The hands -- Michel Waisvisz 1984 - present Roland TR-808 Potentiometers • common +Vref Vout types: linear taper, audio taper (log) • rotary, GND linear, multiturn Variable resistors R1 Variable resistor V output R2 Vout = Vref R2/(R1+R2) Bend Sensor FSR • resistance drops when pressed accelerometers • inclination, acceleration Rate Gyros • Analog devices ADXRS410 or similar • voltage output proportional to angular velocity IR distance sensors Sharp GP2D12 (AKA the toilet sensor) http://www.acroname.com/robotics/parts/R48-IR12.html Qprox capacitive sensing QT301 circuit PWM to Analog http://www.tigoe.net/pcomp/analogout.shtml Devantech SRF04 Ranger (acroname.com) • pulse length proportional to distance Hall effect Magnetic field sensors Allegro 1321 linear amplifier in chip! Piezoelectric materials • PZT • PVDF excellent drum triggers, contact microphones Musical controllers derived from pianos, organs PerceptionProduction loop Roland V-drums Drum triggers Korg Wavedrum (Physical Modeling) Typical percussion controller Simplified convolution instrument but not too simple... Simple example simple drum pad Some initial results QuickTime™ and a MPEG-4 Video decompressor are needed to see this picture. prototypes