ESP32_I2S_Teensy4

Two examples that show how an ESP32 can send an audio signal via I2S to a Teensy 4. The Teensy program uses the Teensy Audio Library to receive the signal. The classes AudioInputI2S_ESP32 and AudioOutputI2S_ESP32 are copies of AudioInputI2S and AudioOutputI2S from the audio library. They were only slightly adopted for the 16 bit audio samples of the ESP32. The pins for the I2S connection at the Teensy are 8 (IN1), 21 (BCLK1), 22 (LRCLK1). The pins of the ESP32 can be configured (see ESP32 code). The examples were tested with a ESP32-DEVKITC-32U.