Teensy’s raw power makes it a great candidate for audio analysis and processing projects. Instructables user Fezder realized it would have the power to do real-time audio calculations and fast Fourier transforms (FFTs) required for their Surrounding Sounds Feedback Box (SSFBB) project.
The project consists of two 2.2″ ILI9341-based LCD displays plus an analog panel meter, in addition to the Teensy 3.2 and Audio Adaptor Board. LEDs and a TI LM3915 driver, plus Microchip MCP6002 op-amp and electret microphone with Maxim MAX9814 amplifier round out the package. In addition to the FFT display, scrolling and average peak meters are incorporated. The MCP6002’s built-in automatic gain control (AGC) helps smooth out ambient sounds. Find out more on the project’s Instructables page.