I still don't get it. Any volume change is caused by you, using the remote or the keyboard, right? So why would MP be better at handling it than EG? If MP knows there has been a change, EG knows as well. All you need to do is work some more on your EG tree. For instance, to handle the standby issue, you can have an EG macro triggered when the PC wakes up that sends an unmute to the amp and the PC, making sure they are in sync. You can also have a EG macro that is triggered by Windows right before the standby occurs, which contains whatever actions you need to make sure your system is in a known state.