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.

Diff: main.cpp

Revision:
6:9ada26c2ea8e
Parent:
5:3a753cf68fac
Child:
7:a478d5cc411e
--- a/main.cpp	Tue Feb 02 18:42:49 2016 +0000
+++ b/main.cpp	Mon Feb 08 22:30:53 2016 +0000
@@ -18,15 +18,14 @@
 /*    gOccilator[0]=new Occilator(INTERRUPT_TIME_US);*/
     gOccilator[0]=Occilator::getInstance(OCC_SQUARE,INTERRUPT_TIME_US);
     gOccilator[0]->setOmega(ADD);
-/*    gOccilator[1]=new Occilator(INTERRUPT_TIME_US);*/
-//    gOccilator[1]=Occilator::getInstance(OCC_SQUARE,INTERRUPT_TIME_US);
-//    gOccilator[1]->setOmega(ADD+0x10000);
+/*    gOccilator[1]=Occilator::getInstance(OCC_SQUARE,INTERRUPT_TIME_US);*/
+/*    gOccilator[1]->setOmega(ADD+0x10000);*/
     int volume=0x10000;
     while(1) {
         wait(0.1);
- //       gOccilator[1]->setVolume(volume);
+/*       gOccilator[1]->setVolume(volume);*/
         gOccilator[0]->setVolume(volume);
-        volume-=0x1000;
+/*        volume-=0x1000;*/
         if (volume < 0)
         {
             volume=0x10000;