PianoRollComposer is a MIDI sequencer for composing and playing MIDI music. It uses the standard treble and bass clef staffs, but notes are displayed in the piano roll format, so it shows music with absolute accuracy. Notes are entered directly on the staffs, and you can edit each note to give it the exact characteristics you want. You can input and edit any of 128 MIDI instruments and 58 percussion instruments. If you have a MIDI keyboard, you can play and record any instrument with it. A composition can contain music from 15 instruments and 58 percussion instruments. The music created with it can be played by any MIDI player, and can be shown in standard music notation by programs like Notation Player. And PianoRollComposer can play and display any MIDI music.

The license of this software is Freeware, you can free download and free use this music composer software.