Originally developed Kwan H. Lee as his Master's Thesis project at the MIT Media Lab. This project demonstrates that Voice over IP means bigger changes than just another type of telephone over IP. It offers several audio applications to the user. Among these apps it offers Music, Radio, BabyMonitor among others. Impromptu is written in C++ and implemented on a Compaq Ipaq (handheld device). I participated in the final stage of this project.