Hello, so I just got myself an ipad so that I could play synths with my foot controller. When I hook up the ipad through my interface to listen to it over the computer speakers, it is very quiet. I want to make sure I'm prepared when I start using this live. I'm worried it would have the same volume issue when plugged into a venue's PA mixer. Is there some sort of DI box I need for this, or do you just plug straight into the board? Thanks!