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: Noise.cpp

Revision:
8:dd2da7c0c4c7
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Noise.cpp	Tue Feb 09 05:39:46 2016 +0000
@@ -0,0 +1,26 @@
+#include "Noise.h"
+ 
+ Noise::Noise(long interrupt_us):WT(interrupt_us)
+ {
+    unsigned long src[]=
+    {
+0xCECE,
+0x331,
+0xB3E8,
+0x642A,
+0xFEC6,
+0x1617,
+0x3DDE,
+0xD91,
+0x6BB,
+0xEA83,
+0x9D85,
+0x6FD,
+0xCDCC,
+0xE686,
+0x80A2,
+0xF86F,
+
+    };
+    setWave(src);
+}
\ No newline at end of file