These kinds of keyboards are not connected to audio interfaces, but rather straight into your computer – because, internally, they are their own USB interface.

MIT’s new and improved knitted keyboard is an instrument like none other — it responds to touch, pressure, and continuous proximity, meaning that you can play it like a keyboard, a theremin ...

From 9to5Toys.com: IK claims the new iRig Keys I/O series keyboards are the only 25 or 49-key options on the market that also include a fully integrated audio interface on-board.

Turn your QWERTY keyboard into a powerful MIDI controller! Learn how to unlock this feature in both free and pro versions of Waveform.

The very flat yet stable ESI XSynth MIDI keyboard comes with a synthesizer engine. Ideal for making music on the go.

Now Sam Battle of Look Mum No Computer goes back in time to revisit one of his earliest builds – a Gibson Les Paul with built-in MIDI keyboard.

Kontrol S-Series MK3 hands-on: A high-end MIDI keyboard for the Native Instruments faithful A new keybed with polyphonic aftertouch and large hi-res screen headline the hardware upgrades.