Audio System Controlling Protocol with AES3

The audio system controlling protocol (ASCP) was originally developed for the fully configurable freely scalable digital audio system. The problem of the fiber optic audio system was rather simple: How to control the system over one fiber optic line which is already being used for the audio transmission? Fortunately the current CS8420 IC uses AES3 protocol for the audio transmission over fiber optic. After some research it was found that the AES3 User bit or the Channel Status bit might prove to be quite useful for the project. A protocol may be implemented and applied for control. This led to a further issue: how to construct the structure of the ASCP? Several types of protocol were examined in search for a suitable basic structure for the ASCP. Eventually it was decided that the GPIB (IEEE-488) |1| disposed of the right features. However, the final version of the protocol is not a GPIB clone. The initial coding was followed by a set of difficulties such as setting up the IC\´s registers for inserting of the User bits, how to buffer these manually added bits, interrupt handling, and finally interfacing the system with one PC. The construction period ended in success in the form of a functioning protocol able to completely control the system deserving of the term "fully configurable".