Teensy Audio Library Documentation

The Teensy Audio Library provides 16-bit, 44.1 kHz streaming audio capabilities for Teensy 3.x and Teensy 4.x hardware. It allows for complex audio processing within an Arduino sketch by providing objects for:

• Playback & Synthesis: Polyphonic playback and various synthesis methods.
• Processing: Effects, filtering, and mixing.
• Analysis & Recording: Audio analysis and recording capabilities.
• Routing: Flexible signal routing between library objects and support for multiple simultaneous inputs and outputs.
• Streaming: Automatic audio streaming that runs in the background while your main Arduino sketch executes.

The library supports various hardware configurations for input and output:

• Audio Adaptor Board: Provides 16-bit stereo input and output. Dual boards can be used for quad-channel 16-bit I/O.
• Teensy 3.x/4.x Native I/O:
  • DAC Output: 12-bit Mono or Stereo output (depending on specific Teensy model).
  • ADC Input: Mono or Stereo input (depending on specific Teensy model).
  • PWM Output: Mono output.
• USB Audio: Supports bi-directional stereo streaming to a PC.

The Audio System Design Tool is a graphical interface used to design audio projects visually. Instead of manually writing routing code, you can:

1. Browse features: Explore the library's available objects and effects.
2. Connect objects: Visually wire audio objects together to create a signal chain.
3. Export code: Automatically generate the corresponding Arduino code for your design.
4. Access API details: Quickly find the specific functions required to control each object from your Arduino sketch.

http://www.pjrc.com/teensy/gui/index.html