IDLE HANDS

I bought an arduboy, or rather I kickstarter backed it, and yesterday it arrived. So naturally I had to do a little noise synth test on it. The piezo on it is very weak, so the audio in the movie was the best I could capture. Sorry.

This is the source if you want to test it out yourselves

downlad version

HelloNOISE.ino download

#include "Arduboy.h"
Arduboy arduboy;

 

//counter for sound
float floatI = 0;

float tempo = 0.5;

int currentsound = 4;


void setup() {
 arduboy.begin();
 arduboy.setFrameRate(15);
 pinMode(PIN_SPEAKER_1, OUTPUT);

}


byte sound1(int i)
{
 return i / 13 >> (1 + ((i >> 12) & 3)) | i / 2 >> 2 & (i / 6) >> 7 | i & 31 * i * (i >> 8);
}

byte sound2(int i)
{
 return (i / 3 >> (i % 40 + 5) | i / (24 + i & 3) >> (i % (15 - ((i >> 15) % 8) * 6) + 5)) / 8;
}

byte sound3(int i)
{
 return i >> 2;
}


byte sound4(int i)
{
 return int( ((sin(i * 0.005) / 2.0) + 1) * 127);
}


byte getSound(byte soundtype, int i)
{
 //yes yes, can be done with function array pointers.

 switch (soundtype)
 {
 case 1:
 {
 return sound1(i);
 }
 case 2:
 {
 return sound2(i);
 }
 case 3:
 {
 return sound3(i);
 }

 case 4:
 {
 return sound4(i);
 }



 }
}

void loop() {

 // always write the sound out begore doing or not doing arduboy stuff
 int i = (int)floatI;
 int a = getSound(currentsound, i);

 digitalWrite(PIN_SPEAKER_1, a % 2); //writing the output sound

 floatI += tempo; //float counter so that you can set tempo


 if (!(arduboy.nextFrame()))
 return;


 arduboy.clear();

 for (int x = 0; x < 128; x++)
 {
 int y = getSound(currentsound, floatI + x);
 arduboy.drawPixel(x, y % 64, 1);
 }

 if (arduboy.pressed(A_BUTTON) ) {
 tempo += 0.1;
 }

 if (arduboy.pressed(B_BUTTON) ) {
 tempo -= 0.1;
 }

 if (arduboy.pressed(UP_BUTTON) ) {
 currentsound = 1;
 floatI = 0;
 }

 if (arduboy.pressed(DOWN_BUTTON) ) {
 currentsound = 2;
 floatI = 0;
 }

 if (arduboy.pressed(LEFT_BUTTON) ) {
 currentsound = 3;
 floatI = 0;
 }

 if (arduboy.pressed(RIGHT_BUTTON) ) {
 currentsound = 4;
 floatI = 0;
 }



 arduboy.display();


}