Volume goes down after choosing "Original Sound On"

[janorino]

After updating my Zoom to Mac Version: 5.9.6 (4993) now when people choose "Original Sound On" my sound volume drops significantly - even though all of my volume settings are on maximum. I need to use Original Sound because I am teaching voice and I can't have the Zoom filters trying to edit out the high notes! Please someone help me.... I feel like I'm going deaf!