Wave Table Synthesizer(Occilator only). I will make Envelope Generator and MML for play music.
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.
Diff: main.cpp
- Revision:
- 7:a478d5cc411e
- Parent:
- 6:9ada26c2ea8e
- Child:
- 8:dd2da7c0c4c7
--- a/main.cpp Mon Feb 08 22:30:53 2016 +0000 +++ b/main.cpp Tue Feb 09 02:57:27 2016 +0000 @@ -16,16 +16,18 @@ int main() { /* gOccilator[0]=new Occilator(INTERRUPT_TIME_US);*/ - gOccilator[0]=Occilator::getInstance(OCC_SQUARE,INTERRUPT_TIME_US); +/* gOccilator[0]=Occilator::getInstance(OCC_SQUARE,INTERRUPT_TIME_US);*/ + gOccilator[0]=Occilator::getInstance(OCC_SINE,INTERRUPT_TIME_US); gOccilator[0]->setOmega(ADD); -/* gOccilator[1]=Occilator::getInstance(OCC_SQUARE,INTERRUPT_TIME_US);*/ -/* gOccilator[1]->setOmega(ADD+0x10000);*/ +/* gOccilator[1]=new Occilator(INTERRUPT_TIME_US);*/ +// gOccilator[1]=Occilator::getInstance(OCC_SQUARE,INTERRUPT_TIME_US); +// gOccilator[1]->setOmega(ADD+0x10000); int volume=0x10000; while(1) { wait(0.1); -/* gOccilator[1]->setVolume(volume);*/ + // gOccilator[1]->setVolume(volume); gOccilator[0]->setVolume(volume); -/* volume-=0x1000;*/ + volume-=0x1000; if (volume < 0) { volume=0x10000;