Yes, this is true. Have you ever been in a great mood and decided to listen to music but, a sad song comes on? Well if you have, you probably feel a little down after the song is over, even if you we're in a fantastic mood just a couple minutes before. Same thing goes for the other way around. Like say your all happy then you listen to a sad song.
I would think it world be the meter because that makes it sound 10 times better
A wood chest made from ply wood and 2x4