White Noise Manipulation

The concept behind this project was to create an audio visual which was driven by external inputs. Pure Data is used to create both the audio and the visual components. Arduino is employed in order to generate incoming data. The circuitry which drives the audiovisual is made up of a potentiometer, a photocell and 10K resistor. User interaction determines what the values might be i.e. twisting the pot or covering the photocell. Additionally 3 LEDs and 3 220 Ohm resistors were implemented into the circuit to provide an output light display.

The functionality and display is determined within Pure Data. As values are incoming from the pot, the dynamics of the audiovisual change. The pot controls the speed of a rotating rectangle and also the center frequency value. As the pot is rotated clockwise both the rotation speed and center frequency increase. Simultaneously, the pot also controls the speed of the LEDs. The photocell determines the harmony. These values are scaled and passed on. Noise~ and band pass filter objects created the white noise effect. Reverberation can also be implemented by manually changing the wetness, dryness and room size values. Visually, the rectangle constantly changes colours due to a metro driving selected messages. Also, the user may choose between having a fill or not by selecting the desired message.

Unfortunately, the input does not tie into my original concept. Originally, my plan was to use a wind thermal sensor whereby the user would blow on the sensor and in turn increase the values controlling the frequency and rotation. Prior to building the circuit, I realized that my wind sensor had been damaged in storage. I had to use a pot to mimic the effect.