I've heard that my Rocky is a lot louder than others who have it. Does this sound normal to you? I have the grinder set to about 8-9 in this video. This is the setting I have for fresh beans. With older beans I have to dial down to around 4-5. …
Duration : 0:0:13
Me making a typical espresso shot. Gaggia Carezza espresso machine, with Gaggia conical burr grinder set to 6. Lighthouse Coffee Roaster’s Choice beans, less than 1 week old. 
Shows how I clean or replace the burrs in my coff grinder.
The sound from my coffee grinder to make an espresso.