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: Occilator.h

Revision:
4:2febde858269
Parent:
3:32094530d55e
Child:
5:3a753cf68fac
--- a/Occilator.h	Sat Jan 30 09:26:02 2016 +0000
+++ b/Occilator.h	Sat Jan 30 09:52:44 2016 +0000
@@ -3,16 +3,21 @@
 
 #define OCCILATOR_PART_NUM 64
 
+enum Occilator_Type
+{
+    OCC_NONE,
+    OCC_SQUARE,
+    OCC_SINE,
+    OCC_WT,
+    OCC_NOISE,
+};
+
 class Occilator
 {
     public:
-    /**
-    * Constructor(only)
-    * to construct after mbed has started.
-    * this constructor handles interval timer automatically.
-    * @value interrupt_us interrupt span (micro second). it work at first time only.
-    */
-        Occilator(long interrupt_us);
+    
+        static Occilator* getInstance(Occilator_Type type,long interrupt_us);
+    
         
         /**
         * Destructor
@@ -42,5 +47,14 @@
         long m_Angle;
         long m_Omega;
         int m_Volume;
+        
+protected:
+    /**
+    * Constructor(only)
+    * to construct after mbed has started.
+    * this constructor handles interval timer automatically.
+    * @value interrupt_us interrupt span (micro second). it work at first time only.
+    */
+        Occilator(long interrupt_us);        
 };
 #endif
\ No newline at end of file