Different music could cause different stress levels. Thats why they suggest to have it completly quiet. But if anyone get's great results playing putting a speaker next to their plant and plays thrash all night, if it works let me know.
Alright, just an observation, but everyone i've smoked with, whenever we're all lit, does it just come normal for everyone to drive 10 mph under the speed limit? I'm just curious to find out how many people actualy suffer this mental instablility of not to go fast.