Tsuyoshi TSUCHIMOTO / Mbed 2 deprecated Synthesizer

Wave Table Synthesizer(Occilator only). I will make Envelope Generator and MML for play music.

Dependencies:   mbed

Project: Synthesizer. It is using embed to Chip Tune Synthesizer for NXP LPC1768.

At First

Prepare an amplifier with volume wheel. The amplifier wire at pin1 to pin18(D/A converter) from IC Clip or Breedboard.

Play

Check out this project and deploy your mbed. And then push the reset key.

You hear a sound from amplifier.

Modify

First step, you can see main.cpp. This source file plays an occilator with "wait()". Modify frequency at 

#define ADD 0x2000000

on the top of source.

Occilator select 7 waveforms.

  • OCC_NONE,
  • OCC_SQUARE,
  • OCC_SINE,
  • OCC_SAW,
  • OCC_WT,
  • OCC_NOISE,
  • OCC_TRIANGLE,

WT means WaveTable Synthesizer.Use "setWave()" function at first.Wavetable will copy in instance.

Change there for waveform.

    gOccilator[0]=Occilator::getInstance(OCC_SAW,INTERRUPT_TIME_US);

INTERRUPT_TIME_US depends sampling rate. Don't change.

Total volume of D/A converter is setting this place.

        gOccilator[0]->setVolume(volume);

By the way, this sample output 0 to 1V(not3.3V) for deforming distortion.

ToDo

  • Envelope generator and LFO(with delay)
  • MML(Music Macro Language)
  • Sample Song(I will make a Japanese Anime music,perhaps)

Project Goal Date

I will make for Comic Market 90(2016.Aug. in Tokyo).And these thing will be written in a Doujinshi.

main.cpp@10:40bed7449a81, 2016-02-10 (annotated)

Committer:
117Florian
Date:
Wed Feb 10 10:55:08 2016 +0000
Revision:
10:40bed7449a81
Parent:
9:d2a5406650ae 
Adjust volume saw.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
117Florian 0:df2c24629de5 1 #include "mbed.h"
117Florian 0:df2c24629de5 2 #define MAIN
117Florian 0:df2c24629de5 3 #include "global.h"
117Florian 0:df2c24629de5 4
117Florian 1:af7abed0bfb5 5 #define ADD 0x2000000
117Florian 8:dd2da7c0c4c7 6 /*#define ADD 0x200000*/
117Florian 1:af7abed0bfb5 7
117Florian 1:af7abed0bfb5 8 /*static unsigned int gLEDOn=0x0;*/
117Florian 3:32094530d55e 9 static Occilator* gOccilator[2];
117Florian 0:df2c24629de5 10
117Florian 1:af7abed0bfb5 11 DigitalOut myled1(LED1);
117Florian 1:af7abed0bfb5 12 DigitalOut myled2(LED2);
117Florian 1:af7abed0bfb5 13 DigitalOut myled3(LED3);
117Florian 1:af7abed0bfb5 14 DigitalOut myled4(LED4);
117Florian 1:af7abed0bfb5 15 //static void tick();
117Florian 0:df2c24629de5 16
117Florian 0:df2c24629de5 17 int main() {
117Florian 4:2febde858269 18 /* gOccilator[0]=new Occilator(INTERRUPT_TIME_US);*/
117Florian 7:a478d5cc411e 19 /* gOccilator[0]=Occilator::getInstance(OCC_SQUARE,INTERRUPT_TIME_US);*/
117Florian 9:d2a5406650ae 20 gOccilator[0]=Occilator::getInstance(OCC_TRIANGLE,INTERRUPT_TIME_US);
117Florian 3:32094530d55e 21 gOccilator[0]->setOmega(ADD);
117Florian 7:a478d5cc411e 22 /* gOccilator[1]=new Occilator(INTERRUPT_TIME_US);*/
117Florian 7:a478d5cc411e 23 // gOccilator[1]=Occilator::getInstance(OCC_SQUARE,INTERRUPT_TIME_US);
117Florian 7:a478d5cc411e 24 // gOccilator[1]->setOmega(ADD+0x10000);
117Florian 5:3a753cf68fac 25 int volume=0x10000;
117Florian 0:df2c24629de5 26 while(1) {
117Florian 2:96affff92e0e 27 wait(0.1);
117Florian 7:a478d5cc411e 28 // gOccilator[1]->setVolume(volume);
117Florian 3:32094530d55e 29 gOccilator[0]->setVolume(volume);
117Florian 10:40bed7449a81 30 volume-=0x1000;
117Florian 2:96affff92e0e 31 if (volume < 0)
117Florian 2:96affff92e0e 32 {
117Florian 5:3a753cf68fac 33 volume=0x10000;
117Florian 2:96affff92e0e 34 }
117Florian 0:df2c24629de5 35 }
117Florian 0:df2c24629de5 36 }