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 Feb 10 10:12:57 2016 +0000
+++ b/main.cpp	Wed Feb 10 10:55:08 2016 +0000
@@ -27,7 +27,7 @@
         wait(0.1);
  //       gOccilator[1]->setVolume(volume);
         gOccilator[0]->setVolume(volume);
-/*        volume-=0x1000;*/
+        volume-=0x1000;
         if (volume < 0)
         {
             volume=0x10000;