New stock to be expected on dec 1 2022 Colors of PCB as of 13 July is green and not blue!

What is it?

This amazing piece of technology is a 4-in-1 visualizer for audio. It uses two displays to show you exactly what you want to see. One Screen will always display a Stereo VU meter, analog style. For the other display, you can choose between four options. You can display another VU meter so that both screen show the same information or you can have it show a stereo spectrum analyzer of maximum 69 channels in Stereo. You also have to option to show a digital VU meter of a Correlation meter. If we take the VU meter on one screen ( L and R channel) and the Spectrum analyzer on the other( 69 Left + 69 Right frequency bins) we are actually looking at a 140 channel analyzer. Amazing! It used a Teensy 4.1 with added external PSRAM and a Teensy Audio board to do the actual FFT analysis in real time. Because of this combination of hardware, it is very fast and it is easy for the display to keep up with the audio.

Why did you make it?

IT was a challenge to get two displays to work with a Teensy at a very high speed. Having success with this, I want to share it with the community so everyone can learn from it.

What makes it special?

The Audio Visualizer used a Teensy Audio Board that has the capability to do real fast, real time audio FFT analysis. This makes it a perfect starting point for spectrum analyzers.

Options

You can buy two version: 1. PCB only with no components. You will have to buy and solder all components yourself. 2. PCB pre-assembled. You will have to add the Audio Board, The Teensy controller, the external Ram, the displays, a fuse and some headers and sockets for the Audio Board and Teensy.