Audio Adaptor Board for Teensy 4.0

• This audio adapter lets you easily add high quality 16 bit, 44.1 kHz sample rate (CD quality) audio to your projects with a Teensy 4.0
• This Version Rev. D is for Teensy 4.0 only
• International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.

This Audio Adaptor allows you to easily add high quality 16 bit, 44.1 kHz sample rate (CD quality) audio to your projects with a Teensy 4.0. It supports stereo headphone and stereo line-level output, and also stereo line-level input or mono microphone input. The audio chip connects to the Teensy using 7 signals. The I2C pins SDA and SCL are used to control the chip and adjust parameters. Audio data uses I2S signals, TX (to headphones and/or line out) and RX (from line in or mic), and 3 clocks, LRCLK (44.1 kHz), BCLK (1.41 MHz) and MCLK (11.29 MHz). All 3 clocks are created by the Teensy. The SGTL5000 chip operates in "slave mode," where all its clock pins are inputs.