Tunning the MIDI keyboard for desired sound. A MIDI keyboard is typically a piano-style user interface keyboard device used for sending MIDI signals or commands over a USB or MIDI cable to other devices connected and operating on the same MIDI protocol interface. MIDI keyboards are a very common feature of a recording studio, and any DAW setup. Most include a transpose function and the ability to set different octaves. Many MIDI keyboards have pitch bend and modulation wheels. Some also have extra sets of assignable rotary knobs and/or buttons for sending custom MIDI messages to the synthesiser, sampler or DAW software. Devices with extra features (also including rhythm input, instrument selection, transport control) are sometimes called keyboard controllers.