Reaper is a digital audio workstation that offers users the ability to use a virtual keyboard to play notes and compose music. To access the virtual keyboard, click on the “View” menu at the top of your screen and select “Virtual Keyboard” from the drop-down menu. This will open up the midi editor window with all its controls including a full size piano keyboard. You can then plug in any external MIDI controller for more control over your sound, or you can use your mouse or computer keyboard to input notes directly into Reaper's sequencer grid as you would do with an actual physical piano/keyboard. Additionally, Reaper allows users to customize their own hotkeys so they can easily trigger specific functions within their project quickly and efficiently while working in real time.