Testing audio output

Reference Signals

When creating signal generators yourself, you will want to compare your audio output to reference signals. Here are a few audio programing languages/environments that might be useful.

• [Chuck]-audio programming language

• [Pure Data]- a graphical audio programming language

• [SuperCollider]-audio programming language

SAMPLE CHUCK CODE

//** Comment/uncomment the different oscillators to hear each **//

SinOsc s => dac; //TriOsc s => dac; //SqrOsc s => dac; //PulseOsc s => dac;

.2 => s.gain;

while( true ) {

   440.0 => s.freq;
   100::ms => now;

}

//************ Use this for impulse ****************//

//Impulse i => dac; //while( true ) { // 1.0 => i.next; // 100::ms => now; //}

//*************** Use this for noise *********************//

//Noise n => dac; //.2 => n.gain; //while( true ) //{ // 100::ms => now; //}

Download and install. From there you'll need to create a small bit of code to make the same output signals.