Visual Acoustics is like a drawing canvas (done in Macromedia Flash) that lets you compose music with visualizations using just the mouse. [watch this short screencast video]

You can set your mouse as one or more musical instruments like the Piano, Violin, Flute or the Guitar.

As you move the cursor around the screen canvas, the program determines which intrumental note the mouse brush paints onto the screen.

Too much fun. Wish they provided an option to record and save the music compositions.

Visual Acoustics [via magnolia.com]