Great work! This brings back memories of futzing with knobs on a boombox as a kid.

For your sake, I hope you built a heaphone jack.

Thank you! Unfortunately I decided to save that feature for v2!

Strong sugestión for v2: Add a hidden knob to regulate the max volume. Kids love to raise it to the max.

(In a tablet, I had to secretly add some transparent tape between the speaker and the plastic cover case.)