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/main.cpp	Wed Jan 20 08:22:46 2016 +0000
+++ b/main.cpp	Thu Jan 21 10:24:33 2016 +0000
@@ -2,20 +2,30 @@
 #define MAIN
 #include "global.h"
 
-#define ADD 0x2000000;
+#define ADD 0x2000000
+/*#define ADD 0x20000*/
+
+/*static unsigned int gLEDOn=0x0;*/
+static Channel* gChannel[2];
 
-static unsigned int gLEDOn=0x0;
-
-
-static void tick();
+DigitalOut myled1(LED1);
+DigitalOut myled2(LED2);
+DigitalOut myled3(LED3);
+DigitalOut myled4(LED4);
+//static void tick();
 
 int main() {
-    gTicker.attach_us(tick,22);
+//    gTicker.attach_us(tick,22);
+//    myled1=1;
+    gChannel[0]=new Channel(INTERRUPT_TIME_US);
+    gChannel[0]->setOmega(ADD);
+    gChannel[1]=new Channel(INTERRUPT_TIME_US);
+    gChannel[1]->setOmega(ADD+0x100000);
     while(1) {
         wait(1);
     }
 }
-
+/*
 void tick()
 {
     if (gLEDOn & 0x80000000)
@@ -29,4 +39,5 @@
         signal = 0;
     }
     gLEDOn+=ADD;
-}
\ No newline at end of file
+}
+*/
\ No newline at end of file