July 19, 2026
Piano gadget sparks comment-section concerto
What I learned selling 2,500 MIDI recorders: Hardware is not so hard
He sold 2,500 music gadgets and the comments instantly started a nerd civil war
TLDR: The founder of a piano-recording gadget says selling 2,500 units proved building physical tech products can be easier than people think if you keep them simple. Commenters immediately turned that into a debate, with some begging for behind-the-scenes war stories and others bluntly calling the take oversimplified.
A solo founder just pulled off a very internet-flex move: he built Jamcorder, a little device that automatically records piano playing, sold 2,500 units, and then casually dropped the line that sent the comment section into orbit: hardware isn’t actually that hard. According to him, the real pain was the software side, which took years, endless late nights, and around 200,000 lines of code. The hardware? Kept intentionally simple, and far less dramatic than its scary reputation suggests.
Naturally, the community reacted like someone had kicked open the doors to a very opinionated workshop. Some readers leaned in with excited AMA-style questions about the juicy stuff founders usually gloss over: What nearly killed the business? How do you stop copycats? What about safety and government approvals? Those comments gave the whole thread a delicious backstage-energy, like everyone wanted the real founder horror stories, not just the victory lap.
But the spiciest reaction came from a commenter who flat-out called the main takeaway “a poor take” and pushed back on the idea that software is automatically the harder part. That’s where the drama really lives: one side saying, “See? Building physical products is doable if you keep it simple,” and the other basically replying, “Easy for this product, maybe—don’t rewrite reality.” It’s less a calm business post and more a comment-section cage match over whether the old saying should be retired, revised, or defended with a soldering iron.
Key Points
- •The article says Jamcorder launched about 18 months earlier and has sold 2,500 units.
- •The author states that software development, not hardware, was the most difficult part of building Jamcorder.
- •Jamcorder’s software stack is described as roughly 200,000 lines of code across firmware, an app, and manufacturing tooling.
- •The hardware was intentionally simplified through choices such as single-PCB assembly, simple injection molding, and removal of several features including USB-C.
- •The article ends with practical advice for hardware businesses, including keeping the BOM simple, targeting at least 70% gross margin, working with Chinese suppliers, and doing final QA in-house.