Helix Producer from RealNetworks is a program that allows you to convert audio and video into streaming media. This instruction describes how to record audio file using demo version of the tool, which is distributed for free. As it is a demo version many functions are disabled and it's functionality is significantly restricted. Audio property which I recommend in the §4 is one of many possible variants. If you have any question regarding the tool please look into Helix's Help or send your question to LT support.