I've already got Line6 HD500 for recording guitar. But now I usually use HD500 as an audio interface. Do I need an extra DI box to record DI tone with HD500 to use with VST amp sim softwares? When I use this routing: guitar -> "guitar input" on HD500 -> DAW (Studio One 2.6), the signal is quite low, about -19dbFS at peaks. Is this normal? Or I have to increase the gain of the mixer section in HD500? How much loud is good for DI tone? Thanks SR for my bad English