More than likely its because Vos is a clod and doesnt know what he's doing.

Isn't it because Ant bitched about them using any of his shit

Kind of a poor move on Anthonys part too. Sxm owns the material anyway it's not like Anthony does, and maybe they weren't paying him but atleast he's still getting his name out there which could lead to future subscriptions on his show. Another short sighted move by Anthony. Opie & Anthony have been making them their entire careers. Ant way to let anger hold you back again.

Goodness gracious !

why?

Or maybe he couldn't play his voice for some technical reason.