FreePiano is an open source virtual MIDI keyboard and a VST host.You can use freepiano to Play piano with computer keyboard or MIDI keyboard with any vst instrument you like, or output through MIDI.Or generate any MIDI message with any key on the keyboard.You can also record your song and export a MP4 movie to share with your friends.FreePiano Features: DirectSound, WASAPI, ASIO and MIDI output support. Supports VST 2 instruments. Full keyboard customizable. Record a song and export to MP4.