Joy-It Teensy 4.0 Audio PCB extension board

With this audio adapter you can easily add high-quality audio with 16 bit and 44.1 kHz sampling rate (CD quality) to your projects with Teensy 4.0. It supports stereo headphones and stereo line level output, as well as stereo line level input or mono microphone input.

With the Teensy Audio Library, you can use both input and output simultaneously with a toolkit of audio editing objects to easily create all types of sophisticated audio applications. You can play multiple sound files, create synthetic waveforms, apply effects, mix multiple streams, and output high-quality audio through headphones or line-out pins.

Teensy 3.x have the Cortex-M4 DSP instructions, which offer a lot of computing power for real-time FFT (spectrum analysis) and thus offer the possibility to create advanced sound reactive projects.

Two of these 14x1 pins can be used to simply solder the Teensy 3.x and the audio board together. They can be connected via a 14-pin socket and a 14-pin plug connector.