Ledset Software has recently released a small freeware application called "Sofeggio Mixer". Solfeggio Mixer allows you to adjust the volume of the six individual tones of the ancient Solfeggio scale said to have positive effects in healing and growth (both spiritual and physical). The application also includes a novel Fibonacci Arpeggiator. Basically this allows you to select several tones from the scae to be played in a non repeating sequence based on the Fibonacci number system. This coupled with the inbuilt digital delay leads to a very pleasant soundscape. The application is free and very high quality so why not give it a spin on your Windows PC: http://www.ledset.com/solfeggio/index.htm