Pokitto SynthTest
This demo shows how to make “ground up” sounds by directly controlling the Pokitto oscillators.
Attention!:
Watch your ears! If you put headphones on and max volume, it can be very loud!
https://os.mbed.com/teams/Pokitto-Community-Team/code/SynthTest/
Project settings (My_settings.h)
#ifndef MY_SETTINGS_H
#define MY_SETTINGS_H
#define PROJ_HIRES 0 //1 = high resolution (220x176) , 0 = low resolution fast mode (110x88)
#define PROJ_ENABLE_SOUND 1 // 0 = all sound functions disabled
#define PROJ_ENABLE_SYNTH 1
#endif
SynthTest.cpp
#include "Pokitto.h"
#include "Synth.h"
Pokitto::Core game;
Pokitto::Display disp;
Pokitto::Sound snd;
Pokitto::Buttons btn;
int tonefreq=33;
uint8_t amplitude = 255;//127;
uint8_t wavetype = 1, arpmode=0;
uint32_t changed = 1;
char notestr[6];
uint8_t sbindx=0,sbx=0,prevy=0;
int main()
{
game.begin();
snd.setVolume(snd.getMaxVol()); // volume to max level depending on headset/speaker safety level
disp.persistence = true;
disp.color=wavetype+1;
disp.bgcolor=0;
uint8_t sbindx=0;
int oldvol=0;
int linecenter = (disp.height/4)-10; // center oscilloscope line vertically
snd.ampEnable(1);
snd.playTone(1,tonefreq,amplitude,wavetype,arpmode);
// want to have 2 oscillators 1 octave apart ?
// snd.playTone(2,tonefreq+12,amplitude,wavetype,arpmode);
disp.clear();
disp.print("Frq:");
getNoteString(notestr,tonefreq);
disp.println(notestr);
disp.print("Vol:");
disp.println((int)amplitude);
disp.print("Wav:");
disp.print((int)wavetype);
switch (wavetype) {
case 0:
disp.println(" Off");break;
case 1:
disp.println(" Square");break;
case 2:
disp.println(" Saw");break;
case 3:
disp.println(" Triang");break;
case 4:
disp.println(" Noise");break;
case 5:
disp.println(" SqNois");break;
}
disp.print("HWvol:");
disp.println((int)snd.getVolume());
disp.lcdRefresh(disp.screenbuffer);
while (game.isRunning()) {
#ifdef POK_SIM
#define DEBOU 2048*32
#else
#define DEBOU 256
#endif
if (changed == 0) {
if(btn.upBtn()) { amplitude++; changed = DEBOU; }
if(btn.downBtn()) { amplitude--; changed = DEBOU; }
if(btn.leftBtn() && (tonefreq > 0)) { tonefreq --; changed = DEBOU; }
if(btn.rightBtn() && (tonefreq < 88)) { tonefreq ++; changed = DEBOU; }
if(btn.released(BTN_A) && wavetype > 0 ) { wavetype--; changed = DEBOU*10;}
if(btn.released(BTN_B) && wavetype < 5 ) { wavetype++; changed = DEBOU*10;}
if (snd.getVolume() != oldvol) changed=DEBOU;
if (changed) {
disp.clear();
disp.color=0;//owavetype+1;
disp.fillRectangle(0,0,109,34);
disp.color=wavetype+1;
disp.bgcolor=0;
disp.print("Frq:");
getNoteString(notestr,tonefreq);
disp.println(notestr);
disp.print("Vol:");
disp.println((int)amplitude);
disp.print("Wav:");
disp.print((int)wavetype);
switch (wavetype) {
case 0:
disp.println(" Off");break;
case 1:
disp.println(" Square");break;
case 2:
disp.println(" Saw");break;
case 3:
disp.println(" Triang");break;
case 4:
disp.println(" Noise");break;
case 5:
disp.println(" SqNois");break;
}
disp.print("HWvol:");
disp.println((int)snd.getVolume());
snd.playTone(1,tonefreq,amplitude,wavetype,arpmode);
oldvol = (int) snd.getVolume();
// want to have 2 oscillators 1 octave apart ?
// snd.playTone(2,tonefreq+12,amplitude,wavetype,arpmode);
}
} else changed--;
disp.color=0;
disp.drawColumn(sbx,38,disp.height);
disp.color=wavetype+1;
uint8_t tindex = sbindx*2;
int16_t y = linecenter + (((int)128-(soundbuf[tindex]))>>1);
disp.drawLine(sbx-1,prevy,sbx,y);
game.update();
disp.color=0;
prevy=y;
sbx++;sbindx++;
if (sbx>disp.width-1) {sbx=0;}
}
return 0; // good manners!
}
