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Dev tools · February 28, 2024

MidiCard

The world's smallest MIDI Keyboard

MidiCard launched on February 28, 2024 with 4 votes. The site was still online in September 2026, 2 years on.

What it does

MidiCard is a credit card-sized MIDI keyboard controller that fits in your wallet. With class-compliant USB C, it's compatible with Mac, PC, iPhone, Android, and iPad. Created on a PCB with buttons for octave, sustain, modulation, and dynamics.

MidiCard Plus is a small USB C MIDI Controller. It's has 25 keys, octave and velocity buttons, compatible with Mac, PC, iPhone, Android, and Tablets.

$ 60.00 – $ 66.00 Price range: $60.00 through $66.00 A full 25-key USB-C MIDI controller that fits in your pocket. MidiCard Plus is a small class-compliant USB-C PCB MIDI Piano Keyboard with 25 keys compatible with mac, PC, iPhone, Android, and tablets. The full two-octave successor to the original MidiCard — now more durable, more playable, and just as portable. The MidiCard Plus is a 25-key two-octave USB-C MIDI controller that fits in your pocket. It’s a class-compliant USB-C PCB MIDI Piano Keyboard and works like other MIDI keyboards – it’s compatible with mac, PC, iPhone, Android, and tablets. Tiny but mighty: Just 4.3″ wide and 2.3″…from makerproducts.art

Does a similar job

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  • MidiCard, a credit card-sized PCB MIDI Keyboard2024 · cdm.link · ▲5

    This is a product I designed and the software is open source.

  • AT
    A tiny portable MIDI looper2020 · beeplab.one · ▲35

    A tiny portable music looper that gets you jamming immediately.

  • I made a tiny device for automatically recording digital pianos2024 · jamcorder.com · ▲590

    Hey HN! A few years ago, I left my cushy big tech job to make hardware. And made the device I always wanted - an automatic piano recorder! I usually play piano improvisationally, and manually hitting record never meshed well with that. But there are always moments I wish I recorded, and now they are! Hopefully it scratches a similar itch for some of you as well! A few of the tech details: * built on an esp32-s3 * custom injection molded enclosure * BLE comms, sd card storage, DS1302 RTC * android & ios apps with Flutter * Shadertoy vfx support for video sharing - Chip

  • MN
    Minimal native MP3 player for Mac2018 · catnapgames.com · ▲156
  • PB
    Perfect Bluetooth MIDI for WindowsMay 2026 · ▲105

    Hi HN, I'm Erwin. I built a small free open-source utility that bridges Bluetooth LE MIDI keyboards into the new Windows MIDI Services stack so any DAW or Web MIDI app can use them as if they were wired. I bought a Roland FP-90X piano partly because it had Bluetooth MIDI. On my Windows 11 PC, pairing succeeded, but my DAW couldn't see the keyboard, and notes I sent from the PC never made the piano sing. After a regrettable number of evenings, I'd separated this into three independent bugs stacked on top of each other. The first one is the famous one: Windows only natively exposes BLE-MIDI…

  • Piano Trainer – Learn piano scales, chords and more using MIDI2025 · github.com · ▲203

    🎹 Memorize piano scales with ease! A piano practice program w/ MIDI support. Consider it an interactive reference manual - ZaneH/piano-trainer

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