ForkATMEGA328を搭載した Arduino Duemilanove 互換機で音をPWM D/A変換出力するシンセサイザーライブラリです。
| Rev. | Time | Author | Message RSS |
| 3c6fdeed | 2020-04-18 23:56:21 |  Akiyoshi Kamide | Doc/keywords update, and macro refactored |
| 817c85c7 | 2020-04-14 01:14:12 | Akiyoshi Kamide | Performance dramatically revived by specifying #pragma GC... |
| 870b0852 | 2020-04-06 05:18:26 | Akiyoshi Kamide | Supported the compilation on Arduino IDE on Linux - Refe... |
| 8fb01690 | 2019-03-31 01:36:20 | Akiyoshi Kamide | ドキュメントの日付を最新化 |
| 4db8be16 | 2019-03-31 01:28:42 | Akiyoshi Kamide | 波形計算の見直し（シェパードトーンを7→8オクターブに変更、... |
| fcbe8ac3 | 2017-05-14 23:53:39 | Akiyoshi Kamide | ・チャンネル優先度指定に対応（特定のMIDIチャンネルについ... |
| 48db0187 | 2017-05-11 00:00:36 | Akiyoshi Kamide | スケッチの例をCAmiDionのスケッチから抜粋して大幅拡充 |
| 38ba7d32 | 2017-05-06 21:57:55 | Akiyoshi Kamide | 応答性の改善 ・ボイスアサイン優先度計算の軽量化（見るボリ... |
| 6d811271 | 2016-06-11 13:25:25 | Akiyoshi Kamide | [BUGFIX] RPNで受信したベンド幅（Pitch Bend Sensitivity）... |
| cc32489e | 2016-04-23 23:45:17 | Akiyoshi Kamide | systemReset() による初期化動作が不十分だったのを修正 |
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[PWMDAC_Synth - PWM DAC synthesizer library for Arduino]
ver.20200418
https://osdn.jp/users/kamide/pf/PWMDAC_Synth/wiki/FrontPage
±êÍACAmiDion
http://www.yk.rim.or.jp/~kamide/music/chordhelper/hardware/
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E¹ðo·Èç tone() ªèÁæ袯ÇAa¹ªoÈ¢c
EanalogWrite() Å PWM o͵ÄàApXgÌügª490HzÆ
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g\Arduino\libraries\
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PWMDAC_Synth ª»êé±ÆðmFµÄ¾³¢B
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//
// KvɶAPWMDAC_Synth.h ðCN[h·éOÉ #define źLðwèÅ«Ü·B
//
#define PWMDAC_OUTPUT_PIN 3 // PWMoÍsÔiȪÂFºLuoÍs(PWM)vQÆj
#define PWMDAC_POLYPHONY 6 // ¯¹iȪÂFºLu¯¹vðQÆj
#define PWMDAC_NOTE_A_FREQUENCY 440 // A¹Ì`
[jOügiȪÂFftHg440Hzj
#define PWMDAC_CHANNEL_PRIORITY_SUPPORT // Áè`lÌDæxðã°é@\ðLø»igíÈ¢êÍȪj
#include <PWMDAC_Synth.h>
//
// g`e[uðAKvȪ¾¯è`µÜ·B
//
PWMDAC_CREATE_WAVETABLE(squareWavetable, PWMDAC_SQUARE_WAVE); // é`g
PWMDAC_CREATE_WAVETABLE(triangleWavetable, PWMDAC_TRIANGLE_WAVE); // Opg
PWMDAC_CREATE_WAVETABLE(sineWavetable, PWMDAC_SINE_WAVE); // ³·g
PWMDAC_CREATE_WAVETABLE(shepardToneSineWavetable, PWMDAC_SHEPARD_TONE); // VFp[hg[i³À¹Kj
PWMDAC_CREATE_WAVETABLE(sawtoothWavetable, PWMDAC_SAWTOOTH_WAVE); // ̱¬èg
//
// g`ÆGx[vp[^iADSRjð Instrument \¢ÌÉ©ËÄ
// vOÌæɹFf[^𶬵ܷB
// à¤Ì {} ÉÍADSRÌlðtÅwèµÜ·ilÌÍÍÉ¢ÄÍãqÌu¹FÏXvðQÆjB
//
PROGMEM const Instrument instrument = {sawtoothWavetable, {9, 0, 11, 4}};
//
// ¶¬µ½¹FðwèµÄPWMDAC_SynthÌÀÌiCX^Xj𶬵ܷB
// MIDI`l1`16ª·×ı̹FÉú»³êÜ·B
//
PWMDAC_CREATE_INSTANCE(&instrument);
setup() {
PWMDACSynth::setup(); // ú»iK{j
#if defined(PWMDAC_CHANNEL_PRIORITY_SUPPORT)
// KvɶÄAfBp[gªüÁÄ¢éMIDI`lÌDæxðµÜ·
//iÚ×É¢ÄÍãqÌu`lDæxwèvðQÆjB
PWMDACSynth::getChannel(1)->setPriority(0xC0);
#endif
}
loop() {
PWMDACSynth::update(); // óÔXViK{j
// £ ±êÍA¸ÈÇÌADSRGx[v`óÌ»ÝÊuðêÂiß½èA
// W
[VÉæÁÄÏ»·éÔ²ÆÌügðXV·é½ßÌÖÅ·B
// ÄÑoµpxÍ©ªÅJE^ðpÓ·éÈÇÌû@ÅRg[µÄ¾³¢B
}
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PWMDAC_POLYPHONY ÉlðÝèµÄRpCµ¼·±ÆŸÂ\Å·B
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ISR() (Interrupt Service Routine: èÝT[rX[`)ɨ¯é
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¦ ISR() ÈÇÅ®ì¬xªv³êé½ßAPWMDAC_Synth.h ÉÍ
#pragma GCC optimize ("-O3")
ªwè³êĢܷBRpCÌÅK»îðA±ÌCu¾¯¬xDæÉ·é½ßÅ·B
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ãqÌu`lDæxwèvðQÆB
oÍs(PWM)
PWM¹ºoÍpƵÄwèÅ«ésÔÍ 3,9,10,11 Ì¢¸ê©Å·B
ftHgÌsÔÍ 3 Å·B
3,11 ðIðµ½êÍ TIMER2A9,10 ðIðµ½êÍ TIMER1 ªgíêÜ·B
ȨAsÔ 5,6 à PWM [qÅ·ªA±êðwèµÄàRpCG[ÉÈèA
pūܹñB±êÍ TIMER0 pÌ ISR() ªAArduino Ì millis() Öð
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PWMDACSynth::getChannel() Å
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ðÝÏ·Å«Ü·BMIDI`lÖÌ|C^ðîµÄA
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iìû@É¢ÄÍ PWMDAC_Synth.h ðQÆj
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PWMDACSynth Åè`³ê½¢Â©Ì static IuWFNgÍA
MIDICuÌ MIDI.setHandleXxxx() ɼÚwèÅ«é`®ÉÈÁĢܷB
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velocity=0 Ì NOTE ON ðÁÄé±Æª éÌÅA»Ì꾯
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MIDI`lÔÍAMIDICuÉí¹Ä 1`16 ÌÍÍÅ
wè·éæ¤ÉìÁÄ èÜ·B
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g`e[uÆADSRGx[vp[^ðA»ê¼ê MidiChannel NXÌ
wavetable Æ envelope[] Éwè·é±ÆÅA¹FðÏXÅ«Ü·B
ܽAInstrument \¢ÌèðvOÌæÉìèA»êð
programChange() Éwè·é¾¯ÅAg`ÆGx[vðêxÉÝèÅ«Ü·B
MIDIÌvO`FWðÀ·éÆ«ÉÖÅ·B
yg`z wavetable
g`e[uÍAvf256Ìbyte^PROGMEMzñƵĶ¬µÜ·B
»êð wavetable Éwè·é±ÆÅAg`ðØèÖ¦é±ÆªÅ«Ü·B
g`ÖÌ}Nð PWMDAC_CREATE_WAVETABLE() }NÉwè·é©A
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ADSR_DECAY_VALUE - fBPCÔi0`15Aå«¢ÙÇm[gIã̸ªäÁèj
ADSR_SUSTAIN_VALUE - TXeBxi0`255A¸ª~ÜÁ½ ÆÛ·é¹Êj
ADSR_RELEASE_VALUE - [XÔi0`15Aå«¢ÙÇm[gItã̸ªäÁèj
ÀÔÍ loop() àÅ update() ðÄÑo·pxÉæÁÄÏíèÜ·B
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±Ì@\ðg¤ÉÍ PWMDAC_CHANNEL_PRIORITY_SUPPORT ð #define ·éKvª èÜ·B
#define PWMDAC_CHANNEL_PRIORITY_SUPPORT
PWMDACSynth::getChannel(`lÔ)->setPriority(`lDæx);
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ìÒF«æµ - Akiyoshi Kamide
http://www.yk.rim.or.jp/~kamide/
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