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: WT.h

Revision:
7:a478d5cc411e
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WT.h	Tue Feb 09 02:57:27 2016 +0000
@@ -0,0 +1,20 @@
+#ifndef _WT_H_INCL
+#define _WT_H_INCL
+#include "Occilator.h"
+
+class WT : public Occilator
+{
+    public:
+        /**
+        * Set waveform.
+        * @param wave Array of waveform.Sutulation is (0xffff).Data number is 16.
+        */
+        virtual void setWave(unsigned long wave[16]);
+        
+        unsigned long m_Wave[16];
+        
+        virtual unsigned long tick();
+        
+        WT(long interrupt_us);
+};
+#endif
\ No newline at end of file