Sensors for new musical instruments Roberto Aimi.

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Presentation 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 present

Roland TR-808

Potentiometers common types: linear taper, audio taper (log) rotary, linear, multiturn +V ref GND V out

Variable resistors V output Variable resistor R2 R1 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)

Qprox capacitive sensing QT301 circuit

PWM to Analog

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

Perception- Production 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

prototypes