A MIDI controller is a particular device that converts physical actions (pressing a key, moving a fader, or turning a knob) into digital MIDI format messages, which transmits to a computer or other controlled device (sampler, sequencer). For example, if we connect the MIDI unit to special programs (FL Studio or Cubase), and the FL Keys will be designated as one of the knobs to monitor the channel’s volume, its turning will proportionally change the piano volume. It isn’t easy to choose the best 25 key midi controller because every device has advantageous design and practical features combination.
A MIDI Controller is a device that sends sound signals via the special connection protocol. When you press a key on the piano MIDI controller, it collects and sends the data to the DAW or another electronic device that can transform the sound, which, in turn, delivers it to the speakers.