Psycho (the name of the my project) was a super fun project to work on. Psycho is an Audio Visualizer. There is a teensy 3.2 in the back of the neck along with a microphone, the teensy preforms the FFT with the help of teensy’s audio library. the different frequency bins are then grouped according to base, mid, and treble, and those bins are then sent over to the lights, with the dB of each bin corresponding to the brightness, and the hue determined by a random value with in the range of the bin. This may seem a bit confusing but the way if works is that when the FFT is preformed, we then get 512 bins all with 40Hz of band per bin. This covers the full audio range of human hearing 20Hz to 20KHz. for this project only the frequency from 40Hz to 3.6 kHz are used, and the bands are defined as follows 1-6, 6-12, 13-20, 21-30, 31-40, 40-90, in terms of the “bins”. I then iterate though the bins in each band, and look for the bin with the highest amplitude, and the that amplitude gets mapped to the brightness, and the bin number gets mapped to the hue, with a small degree of randomness just to get a little more variance in the color.<\/p>\n
example videos of the head working \ud83d\ude42<\/p>\n