Lab 6
Description:
I created a psychedelic music player. Using processing I play a song (.wav) file. Using the pot the user can change the speed of the song. Simultaneously a music wheel starts rotating, which gets faster as the speed of the song increases, creating a visual experience similar to the visuals played by online music players.
Materials:
1 potentiometer
DC motor
CODE:
Arduino
/*
* one pot fades one motor
* modified from AnalogInput
* by DojoDave <http://www.0j0.org>
* http://www.arduino.cc/en/Tutorial/AnalogInput
*
*/
int potPin = 0; // select the input pin for the potentiometer
int motorPin = 9; // select the pin for the Motor
int val = 0; // variable to store the value coming from the sensor
void setup() {
Serial.begin(9600);
}
void loop() {
val = analogRead(potPin); // read the value from the sensor, between 0 - 1024
// Serial.println(val);
analogWrite(motorPin, val/10); // analogWrite can be between 0-255
Serial.println(analogRead(A0));
}
Processing
/**
* Load File
* This code takes a serial input using a sensor( in this case a potentiometer
* and based on the input alters the speed of a .wav file
* It uses an external library called Sonia to alter the sound file
*
*
*/
import ddf.minim.*;
import processing.serial.*;
// importing the external Sonia library
import pitaru.sonia_v2_9.*;
Sample mySample;
Serial port;
void setup()
{
size(512, 200, P2D);
Sonia.start(this); // Start Sonia engine.
// create a new sample object.
mySample = new Sample("beatles.wav");
mySample.play();
port = new Serial(this, "COM3", 9600);
port.bufferUntil('\n');
background(0);
}
void draw()
{
}
void stop()
{
// closing Sonia class
Sonia.stop();
}
void serialEvent (Serial p) {
String inString = port.readStringUntil('\n');
if (inString != null) {
inString = trim(inString);
int inByte = int(inString);
println("val="+inByte);
//altering speed depending on pot value
if(inByte<50)
{
mySample.setSpeed(1);
}
else
{
mySample.setSpeed(inByte/10);
}
}
}
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