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libraries/audio-tools/examples/examples-stream/streams-i2s-serial_16bit/README.md

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+
+# Stream I2S Input to CSV Output
+
+## General Description:
+
+We implement a I2S source: We stream the sound input which we read in from the I2S interface and displays it on the Arduino Serial Plotter. 
+
+We use only 16bits!
+
+## Pins
+
+
+| i2s-device |  ESP32
+| -----------| ---------------
+| BCK        |  BCK (GPIO14)
+| WS         |  WS (GPIO15)
+| DATA       |  IN (GPIO32)
+| GND        |  GND
+| VCC        |  VIN 5V
+
+

libraries/audio-tools/examples/examples-stream/streams-i2s-serial_16bit/streams-i2s-serial_16bit.ino

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+/**
+ * @file streams-i2s-serial_16bit.ino
+ * @author Phil Schatzmann
+ * @brief see https://github.com/pschatzmann/arduino-audio-tools/blob/main/examples/examples-stream/streams-i2s-serial_16bit/README.md
+ * 
+ * @author Phil Schatzmann
+ * @copyright GPLv3
+ */
+
+
+#include "AudioTools.h"
+
+AudioInfo info(44100, 2, 16);
+I2SStream i2sStream; // Access I2S as stream
+CsvOutput<int16_t> csvOutput(Serial);
+StreamCopy copier(csvOutput, i2sStream); // copy i2sStream to csvOutput
+
+// Arduino Setup
+void setup(void) {
+    Serial.begin(115200);
+    AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Info);
+    
+    auto cfg = i2sStream.defaultConfig(RX_MODE);
+    cfg.copyFrom(info);
+    cfg.i2s_format = I2S_STD_FORMAT; // or try with I2S_LSB_FORMAT
+    cfg.is_master = true;
+     // this module nees a master clock if the ESP32 is master
+    cfg.use_apll = false;  // try with yes
+    //cfg.pin_mck = 3; 
+    i2sStream.begin(cfg);
+
+    // make sure that we have the correct channels set up
+    csvOutput.begin(info);
+
+}
+
+// Arduino loop - copy data
+void loop() {
+    copier.copy();
+}