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libraries/audio-tools/examples/examples-audiokit/streams-memory_pcm-mixer-audiokit/streams-memory_pcm-mixer-audiokit.ino

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+/**
+ * @file streams-mixer-audiokit.ino
+ * @author Phil Schatzmann
+ * @brief Simple Demo for mixing 2 input streams
+ * @version 0.1
+ * @date 2022-11-15
+ *
+ * @copyright Copyright (c) 2022
+ *
+ */
+#include "AudioTools.h"
+#include "AudioTools/AudioLibs/AudioBoardStream.h"
+#include "drums.h"
+#include "guitar.h"
+
+InputMixer<int16_t> mixer;
+AudioBoardStream kit(AudioKitEs8388V1);
+MemoryStream drums(drums_raw, drums_raw_len);
+MemoryStream guitar(guitar_raw, guitar_raw_len);
+StreamCopy copier(kit, mixer);
+
+void setup() {
+  Serial.begin(115200);
+  AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Info);  
+
+  // auto restart when MemoryStream has ended
+  drums.setLoop(true);
+  guitar.setLoop(true);
+
+  // setup output
+  auto cfg = kit.defaultConfig(TX_MODE);
+  cfg.channels = 1;
+  cfg.sample_rate = 8000;
+  kit.begin(cfg);
+  // max volume
+  kit.setVolume(1.0);
+
+  mixer.add(drums);
+  mixer.add(guitar);
+  mixer.begin(cfg);
+
+}
+
+void loop() { copier.copy(); }