Built a custom synthesizer + speaker system using a Seeduino Nano, audio‑processing circuits, and a hand‑built cabinet.

Programmed C++ sound‑synthesis features (waveforms, ADSR, sequencing). 

Designed circuits and enclosure; tested audio output and noise levels with an oscilloscope.

Delivered a functioning custom speaker + synth with clean output, reduced noise, and stable real‑time audio performance.