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.

--- a/global.h	Wed Jan 20 08:22:46 2016 +0000
+++ b/global.h	Thu Jan 21 10:24:33 2016 +0000
@@ -4,7 +4,13 @@
 #define EXTERN /**/
 #endif
 
-EXTERN DigitalOut myled(LED1);
-EXTERN AnalogOut signal(p18);
-EXTERN Ticker gTicker;
-//EXTERN Track gTrack;
\ No newline at end of file
+#define INTERRUPT_TIME_US 22
+
+#include "Channel.h"
+
+extern DigitalOut myled1;
+extern DigitalOut myled2;
+extern DigitalOut myled3;
+extern DigitalOut myled4;
+/*EXTERN AnalogOut signal(p18);*/
+/*EXTERN Ticker gTicker;*/