ESP32 synth – Misryoum takes a look at the Spark portable keyboard, a compact ESP32-powered synth that adds sampling and Bluetooth MIDI control.
A pocket-sized synth that actually does a lot more than make notes is turning heads in the maker world.
The Spark portable keyboard from Misryoum is built around an ESP32 and wrapped in a 3D-printed case that nods to the classic handheld synths of the 1980s.. It keeps the hardware approachable. using a real keyboard made with key switches. while still packing in controls designed for tweaking sound on the fly.. Alongside multiple pots for sound adjustment. there are buttons for various functions. making it feel like an instrument you can play rather than a device you only configure.
Even better, an OLED display keeps the session readable, showing what the keyboard is doing as you move through settings and performance modes.
For builders and musicians alike, the ESP32 focus matters because it brings modern connectivity and processing into a format that’s small enough to carry. That combination is what turns a nostalgic-looking keyboard into something more versatile for everyday experimentation.
On the software side, Misryoum notes that the project uses the AMY synth library, with separate repositories available for both the hardware and the software. That approach supports customization, so the Spark can be treated as a starting point for tinkering rather than a locked product.
The headline feature may be how far the device stretches beyond basic synthesis.. In addition to functioning as a fully featured synth. it can operate as a sampler and also serve as a Bluetooth MIDI keyboard.. In practice. that means you can route musical ideas into other gear over wireless MIDI while also capturing and reusing audio within the instrument itself.
In other words, this isn’t just a compact build with clever parts, it’s a flexible workflow tool. Misryoum readers who care about live performance, quick prototyping, or experimenting with sound design will recognize the appeal: one small controller that can cover several roles at once.
If you’re curious, Misryoum highlights that a demo video shows the Spark in action, letting the instrument’s sound and capabilities speak for themselves.