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: Saw.cpp

Revision:
8:dd2da7c0c4c7
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Saw.cpp	Tue Feb 09 05:39:46 2016 +0000
@@ -0,0 +1,26 @@
+ #include "Saw.h"
+ 
+ Saw::Saw(long interrupt_us):WT(interrupt_us)
+ {
+    unsigned long src[]=
+    {
+0x0,
+0x1111,
+0x2222,
+0x3333,
+0x4444,
+0x5555,
+0x6666,
+0x7777,
+0x8888,
+0x9999,
+0xAAAA,
+0xBBBB,
+0xCCCC,
+0xDDDD,
+0xEEEE,
+0xFFFF,
+
+    };
+    setWave(src);
+}
\ No newline at end of file