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libraries/audio-tools/examples/examples-audiokit/streams-synth-audiokit/README.md

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+# A Simple Synthesizer for the AI Thinker AudioKit
+
+I was taking the synthbasic example, extended it to handle multiple keys at the same time and wrapped it into a nice, easy to use class.
+
+Here is a Synthesizer in just 30 lines of code..
+
+### Dependencies
+
+You need to install the following libraries:
+
+- [Arduino Audio Tools](https://github.com/pschatzmann/arduino-audio-tools)
+- [Midi](https://github.com/pschatzmann/arduino-midi)
+

libraries/audio-tools/examples/examples-audiokit/streams-synth-audiokit/streams-synth-audiokit.ino

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+/**
+ * @file streams-synth-audiokit.ino
+ * @author Phil Schatzmann
+ * @copyright GPLv3
+ *  
+ */
+
+#include "AudioTools.h"
+#include "AudioTools/AudioLibs/AudioBoardStream.h"
+
+AudioBoardStream kit(AudioKitEs8388V1);
+Synthesizer synthesizer;
+GeneratedSoundStream<int16_t> in(synthesizer); 
+StreamCopy copier(kit, in); 
+SynthesizerKey keys[] = {{kit.getKey(1), N_C3},{kit.getKey(2), N_D3},{kit.getKey(3), N_E3},{kit.getKey(4), N_F3},{kit.getKey(5), N_G3},{kit.getKey(6), N_A3},{0,0}};
+
+void setup() {
+  Serial.begin(115200);
+  AudioLogger::instance().begin(Serial,AudioLogger::Warning);
+
+  // Setup output
+  auto cfg = kit.defaultConfig(TX_MODE);
+  cfg.sd_active = false;
+  kit.begin(cfg);
+  kit.setVolume(80);
+
+  // define synthesizer keys for AudioKit
+  synthesizer.setKeys(kit.audioActions(), keys, AudioActions::ActiveLow);
+  synthesizer.setMidiName("AudioKit Synthesizer");
+  // Setup sound generation & synthesizer based on AudioKit default settings
+  in.begin(cfg);
+
+}
+
+void loop() {
+  copier.copy();
+  kit.processActions();
+}