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.

Square.cpp@10:40bed7449a81, 2016-02-10 (annotated)

Committer:
117Florian
Date:
Wed Feb 10 10:55:08 2016 +0000
Revision:
10:40bed7449a81
Parent:
5:3a753cf68fac 
Adjust volume saw.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
117Florian 4:2febde858269 1 #include <mbed.h>
117Florian 4:2febde858269 2 #include <Square.h>
117Florian 4:2febde858269 3
117Florian 4:2febde858269 4
117Florian 4:2febde858269 5 Square::Square(long interrupt_us) : Occilator(interrupt_us)
117Florian 4:2febde858269 6 {
117Florian 5:3a753cf68fac 7 }
117Florian 5:3a753cf68fac 8
117Florian 5:3a753cf68fac 9 unsigned long Square::tick()
117Florian 5:3a753cf68fac 10 {
117Florian 5:3a753cf68fac 11 Occilator::tick();
117Florian 5:3a753cf68fac 12 if (m_Angle & 0x80000000)
117Florian 5:3a753cf68fac 13 {
117Florian 5:3a753cf68fac 14 return (0xffff*m_Volume) >> 16;
117Florian 5:3a753cf68fac 15 }
117Florian 5:3a753cf68fac 16 else
117Florian 5:3a753cf68fac 17 {
117Florian 5:3a753cf68fac 18 return 0;
117Florian 5:3a753cf68fac 19 }
117Florian 4:2febde858269 20 }