Mupic is a music drawboard. It enables you to draw simple color lines which are converted into simple sounds. Three basic colors (red, green, blue) represent three different sound modulations (sine, triangle, square wave tones). It can be used both as an excellent music educational tool for children as well as a music experimentation tool for professionals. It is inspired by Iannis Xenakis' UPIC.
This free, ad-supported version has less drawing space (because of the ad space) and therefore cannot play the higher frequency sounds of the paid version.