Left Mouse Button Selects the region. This isn't really scratching yet, as it doesn't change the pitch of the sample, this is mostly useful for syncronising beats by hand. Mouse Button Rotates the loop, to move the start point. Filter cutoff Master Sets this loop to be the master. Play Toggles the loop playback.
Magic number Displays the ratio of play length to master loop play length.
Record from plugin Load wav file Double Doubles the length of the loop. Match Matches the speed and length of the master loop. Removes the selected region, and puts it in the copy buffer. Same as paste, except it mixes the copybuffer over the loop. Halves the length of the loop.