This teaching system (for any short  reed call) is one that interacts with you.  The disc will be put into your computer, the microphone (which is included) will be connected to your computer (USB) and you can listen and learn step by step.    You will be able to  listen  to Tim Grounds, the instructor on this system, and then record yourself making the same sounds  ~  then compare your sounds to Tim's.  Tim will guide you through every step.  You can practice over and over; stop and start at your own convenience.    It is a one-time cost for lessons in the privacy of your home.