OpenSebJ is an audio composition tool. It allows for wave audio files (also known as samples) to be loaded and mixed in real time. Each sample can be assigned to a key on the keyboard and then triggered from the PC keyboard - without the need for a MIDI keyboard. Individual samples can also be scratched, like a record on a turn table, through the UI. The audio can be laid out visually on the screen with samples showing their duration and content. Compositions and live mixing can be streamed to disk through the in built recording tool.