Music Recommendation/Request

[Buford Ripley]

OK, so I'm doing an experiment involving music concerning its effects on aggression. What I need is around 4 pieces of music, the first two being something calming and soothing preferably classical or chamber music and the other two tracks need to be fast paced and aggressive. These tracks also need to be instrumental as lyrics and vocals will create confounding variables that I don't need, thing is I don't know where to start looking.

Can anyone suggest any tracks?

Thanks in advance.

[Bigal]

Would the Blue Danube (I think that's the name) be any good for calm and soothing?

[Buford Ripley]

Works for me. Thanks.

[John Stones' Paint Trophy]

Any kind of Power Metal should be good for fast paced and aggressive. The only difficulty would be finding instrumentals.

In that case, I direct you to Guilty Gear X's Heavy Metal soundtrack. No lyrics and each song is fast and full of so many guitar solos.