Virtual Drummer 1.0b1 - Virtual Drummer is a drum machine built on top of the built in functionality of Quicktime 2.0. This is its first beta release, and as a result, it has not been thoroughly tested and may be unstable. I have had very few problems with it, but please proceed with caution. To add a ヤbeatユ to the song, simply click at the appriate box on the ヤgraphユ. This will place a beat at that spot in the measure. You can set the tempo in the tempo box at the top of the window. Clicking on an existing beat removes it.