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.

Occilator.h@5:3a753cf68fac, 2016-02-02 (annotated)

Committer:
117Florian
Date:
Tue Feb 02 18:42:49 2016 +0000
Revision:
5:3a753cf68fac
Parent:
4:2febde858269
Child:
8:dd2da7c0c4c7
?????3.3V??1V?????

Who changed what in which revision?

UserRevisionLine numberNew contents of line
117Florian 3:32094530d55e 1 #ifndef _OCCILATOR_H_INCL
117Florian 3:32094530d55e 2 #define _OCCILATOR_H_INCL
117Florian 3:32094530d55e 3
117Florian 3:32094530d55e 4 #define OCCILATOR_PART_NUM 64
117Florian 3:32094530d55e 5
117Florian 4:2febde858269 6 enum Occilator_Type
117Florian 4:2febde858269 7 {
117Florian 4:2febde858269 8 OCC_NONE,
117Florian 4:2febde858269 9 OCC_SQUARE,
117Florian 4:2febde858269 10 OCC_SINE,
117Florian 4:2febde858269 11 OCC_WT,
117Florian 4:2febde858269 12 OCC_NOISE,
117Florian 4:2febde858269 13 };
117Florian 4:2febde858269 14
117Florian 3:32094530d55e 15 class Occilator
117Florian 3:32094530d55e 16 {
117Florian 3:32094530d55e 17 public:
117Florian 4:2febde858269 18
117Florian 4:2febde858269 19 static Occilator* getInstance(Occilator_Type type,long interrupt_us);
117Florian 4:2febde858269 20
117Florian 3:32094530d55e 21
117Florian 3:32094530d55e 22 /**
117Florian 3:32094530d55e 23 * Destructor
117Florian 3:32094530d55e 24 * this destructor anatach the interval timer automatically.
117Florian 3:32094530d55e 25 */
117Florian 3:32094530d55e 26 ~Occilator();
117Florian 3:32094530d55e 27
117Florian 3:32094530d55e 28 /**
117Florian 3:32094530d55e 29 * Set angle speed(0x100000000 per 1 round)
117Florian 3:32094530d55e 30 * frequency is depend on interrupt_us
117Florian 3:32094530d55e 31 */
117Florian 3:32094530d55e 32 void setOmega(long speed);
117Florian 3:32094530d55e 33
117Florian 3:32094530d55e 34 /**
117Florian 3:32094530d55e 35 * Set volume(0x10000 max volume)
117Florian 3:32094530d55e 36 * @param volume
117Florian 3:32094530d55e 37 */
117Florian 3:32094530d55e 38 void setVolume(int volume);
117Florian 3:32094530d55e 39
117Florian 3:32094530d55e 40 /**
117Florian 3:32094530d55e 41 * advance the Angle and caliculate value this span.
117Florian 3:32094530d55e 42 * it was called by automatically from interval timer.
117Florian 3:32094530d55e 43 * @return value on this tick(max 0xffff0000)
117Florian 3:32094530d55e 44 */
117Florian 3:32094530d55e 45 virtual unsigned long tick();
117Florian 3:32094530d55e 46
117Florian 3:32094530d55e 47 long m_Angle;
117Florian 3:32094530d55e 48 long m_Omega;
117Florian 3:32094530d55e 49 int m_Volume;
117Florian 4:2febde858269 50
117Florian 5:3a753cf68fac 51 /**
117Florian 5:3a753cf68fac 52 * Volume for All Channel.
117Florian 5:3a753cf68fac 53 * It needs adjust output Voltage(3.3V->1V).
117Florian 5:3a753cf68fac 54 * Also this volume don't change.
117Florian 5:3a753cf68fac 55 */
117Florian 5:3a753cf68fac 56 static void setMasterVolume(long volume);
117Florian 5:3a753cf68fac 57
117Florian 4:2febde858269 58 protected:
117Florian 4:2febde858269 59 /**
117Florian 4:2febde858269 60 * Constructor(only)
117Florian 4:2febde858269 61 * to construct after mbed has started.
117Florian 4:2febde858269 62 * this constructor handles interval timer automatically.
117Florian 4:2febde858269 63 * @value interrupt_us interrupt span (micro second). it work at first time only.
117Florian 4:2febde858269 64 */
117Florian 4:2febde858269 65 Occilator(long interrupt_us);
117Florian 3:32094530d55e 66 };
117Florian 3:32094530d55e 67 #endif