After a thought ran across my mind about the un-used ad824's sitting on the shelf un used and the struggling of having to set gains on the stage for the head amps when using the light viper I decided that why cant the ls9 series have rs422 ah control out. After noticing that the slot 1 only has the ha control capability I searched the schematics to find the difference between port 1 and port 2. There are the tx and rx pins, so after drawing up a converter to convert the digital signal into rs422 I built a small board and decided to set it up on a card before going ahead and mounting it in the ls9 permanently. So I took an old AE8 card from one of the ad824 and jumped it onto it as a host card so as to not modify the ls9 in any way. To my surprise plug in db9 cable and viola it works, I can set ha level and phantom, I use the lightviper foh unit to feed the board analog anyhow so I can set the hpf and invert polarity locally should I need to. But its a handy fix for a lack of planning on yamaha's behalf. It will work with ad8hr's as well but ad824's are cheap and sound great!
