89 lines
2.7 KiB
C++
89 lines
2.7 KiB
C++
/**
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* @file streams-synthbasic-audiokit.ino
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* @author Phil Schatzmann
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* @brief see https://www.pschatzmann.ch/home/2021/12/17/ai-thinker-audio-kit-building-a-simple-synthesizer-with-the-audiotools-library/)
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* Midi Support
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* @copyright GPLv3
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*
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*/
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#include "AudioTools.h"
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#include "AudioTools/AudioLibs/AudioBoardStream.h"
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#include <Midi.h>
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SineWaveGenerator<int16_t> sine;
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GeneratedSoundStream<int16_t> sine_stream(sine);
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ADSRGain adsr(0.0001,0.0001, 0.9 , 0.0002);
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AudioEffectStream effects(sine_stream);
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AudioBoardStream kit(AudioKitEs8388V1);
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StreamCopy copier(kit, effects);
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class SynthAction : public MidiAction {
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public:
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void onNoteOn(uint8_t channel, uint8_t note, uint8_t velocity) {
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int frq = MidiCommon::noteToFrequency(note);
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sine.setFrequency(frq);
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adsr.keyOn();
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}
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void onNoteOff(uint8_t channel, uint8_t note, uint8_t velocity) {
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adsr.keyOff();
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}
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void onControlChange(uint8_t channel, uint8_t controller, uint8_t value) {}
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void onPitchBend(uint8_t channel, uint8_t value) {}
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} action;
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MidiBleServer ble("MidiServer", &action);
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void actionKeyOn(bool active, int pin, void* ptr){
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Serial.println("KeyOn");
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float freq = *((float*)ptr);
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sine.setFrequency(freq);
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adsr.keyOn();
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}
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void actionKeyOff(bool active, int pin, void* ptr){
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Serial.println("KeyOff");
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adsr.keyOff();
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}
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// We want to play some notes on the AudioKit keys
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void setupActions(){
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// assign buttons to notes
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auto act_low = AudioActions::ActiveLow;
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static float note[] = {N_C3, N_D3, N_E3, N_F3, N_G3, N_A3}; // frequencies
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kit.audioActions().add(kit.getKey(1), actionKeyOn, actionKeyOff, act_low, &(note[0])); // C3
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kit.audioActions().add(kit.getKey(2), actionKeyOn, actionKeyOff, act_low, &(note[1])); // D3
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kit.audioActions().add(kit.getKey(3), actionKeyOn, actionKeyOff, act_low, &(note[2])); // E3
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kit.audioActions().add(kit.getKey(4), actionKeyOn, actionKeyOff, act_low, &(note[3])); // F3
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kit.audioActions().add(kit.getKey(5), actionKeyOn, actionKeyOff, act_low, &(note[4])); // G3
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kit.audioActions().add(kit.getKey(6), actionKeyOn, actionKeyOff, act_low, &(note[5])); // A3
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}
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void setup() {
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Serial.begin(115200);
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AudioLogger::instance().begin(Serial,AudioLogger::Warning);
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// setup effects
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effects.addEffect(adsr);
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// Setup output
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auto cfg = kit.defaultConfig(TX_MODE);
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cfg.sd_active = false;
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kit.begin(cfg);
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kit.setVolume(80);
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// Setup sound generation based on AudioKit settins
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sine.begin(cfg, 0);
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sine_stream.begin(cfg);
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effects.begin(cfg);
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// activate keys
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setupActions();
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}
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// copy the data
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void loop() {
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copier.copy();
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kit.processActions();
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} |