… some speakers or headphones, and preferably a quiet place… Watch this, it’s very powerful:
Update:
I’ve found that the embedded video doesn’t work very well, so here is a direct link
… some speakers or headphones, and preferably a quiet place… Watch this, it’s very powerful:
Update:
I’ve found that the embedded video doesn’t work very well, so here is a direct link
Can’t get this one to work 😦