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.
Triangle.cpp@10:40bed7449a81, 2016-02-10 (annotated)
- Committer:
- 117Florian
- Date:
- Wed Feb 10 10:55:08 2016 +0000
- Revision:
- 10:40bed7449a81
- Parent:
- 9:d2a5406650ae
Adjust volume saw.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
117Florian | 9:d2a5406650ae | 1 | #include "Triangle.h" |
117Florian | 9:d2a5406650ae | 2 | |
117Florian | 9:d2a5406650ae | 3 | Triangle::Triangle(long interrupt_us):WT(interrupt_us) |
117Florian | 9:d2a5406650ae | 4 | { |
117Florian | 9:d2a5406650ae | 5 | unsigned long src[]= |
117Florian | 9:d2a5406650ae | 6 | { |
117Florian | 9:d2a5406650ae | 7 | 0x0, |
117Florian | 9:d2a5406650ae | 8 | 0x1FFF, |
117Florian | 9:d2a5406650ae | 9 | 0x3FFF, |
117Florian | 9:d2a5406650ae | 10 | 0x5FFF, |
117Florian | 9:d2a5406650ae | 11 | 0x7FFF, |
117Florian | 9:d2a5406650ae | 12 | 0x9FFF, |
117Florian | 9:d2a5406650ae | 13 | 0xBFFF, |
117Florian | 9:d2a5406650ae | 14 | 0xDFFF, |
117Florian | 9:d2a5406650ae | 15 | 0xFFFF, |
117Florian | 9:d2a5406650ae | 16 | 0xDFFF, |
117Florian | 9:d2a5406650ae | 17 | 0xBFFF, |
117Florian | 9:d2a5406650ae | 18 | 0x9FFF, |
117Florian | 9:d2a5406650ae | 19 | 0x7FFF, |
117Florian | 9:d2a5406650ae | 20 | 0x5FFF, |
117Florian | 9:d2a5406650ae | 21 | 0x3FFF, |
117Florian | 9:d2a5406650ae | 22 | 0x1FFF, |
117Florian | 9:d2a5406650ae | 23 | |
117Florian | 9:d2a5406650ae | 24 | }; |
117Florian | 9:d2a5406650ae | 25 | setWave(src); |
117Florian | 9:d2a5406650ae | 26 | } |