Josh, Yes,, running it on DCS you may have customized the sounds and than the engine stored those settings when you shutdown.
Since you have DCS you can easily just do a feature reset with DCS and see if that clears it up. That keeps the engine in the remote, but goes back to default settings.
If that doesn't work, than try a factory reset with DCS. That will delete the engine from the remote, and you can than try it in conventional, or go and readd to DCS and see if that solves the volume/sound issues.
If you have this engine up on DCS you can hit the menu button, than select Sounds to see if you modified anything. G