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https://github.com/pschatzmann/arduino-audio-tools.git
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62 lines
1.8 KiB
C++
62 lines
1.8 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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* @copyright GPLv3
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*
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*/
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#include "AudioTools.h"
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#include "AudioLibs/AudioBoardStream.h"
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AudioBoardStream kit(AudioKitEs8388V1);
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SineWaveGenerator<int16_t> sine;
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GeneratedSoundStream<int16_t> in(sine);
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StreamCopy copier(kit, in);
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void actionKeyOn(bool active, int pin, void* ptr){
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int freq = *((float*)ptr);
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sine.setFrequency(freq);
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in.begin();
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}
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void actionKeyOff(bool active, int pin, void* ptr){
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in.end();
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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::Info);
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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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in.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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}
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