MARK TROJANOWSKI: Hey. This is Mark Trojanowski from Sister Hazel.

[MARK TROJANOWSKI PERFORMING WITH SISTER HAZEL]

PATRICK OGLE: Somebody has explained to me recently about like the different kinds of drums and the bearing edge on the drums and how they kind of actually like some of the older old drum kits like just [INDISCERNIBLE] because the kind of started to wear out.

MARK TROJANOWSKI: Well the older kit, it kind of goes back to that manufacturing process of the older kits of how having that extra reinforcement hoop because if you think about it, a normal shell is maybe, I don't know, a half-inch thick, but now where the contact point contacts the drumhead, put another half-inch of wood on top of that, so you have a bigger piece of wood touching the head at the top when you have that reinforcement hoop, so that affects the bearing edge, and my dad, who doesn't play, but when I started playing when I was around 10, he really got into the whole bearing edge thing like way beyond like anything that I would ever want to attempt and, you know, a lot of the theories like he would go buy old drums from Slingerland or Ludwig and take a piece of glass and put sandpaper on the glass and put the drum down and just turn it, and so you get the drum perfectly level because, you know, back then, they way they manufactured stuff it wasn't so precise like it is today. SO, you could do that. You could actually affect the sound of the drum by putting your back on the glass and see if you saw any light through the actual shell or if there was equal contact because that's what you really want. It was equal contact so when you put the head on, it's seated properly.

PATRICK OGLE: It's touching at the same place all the way around.

MARK TROJANOWSKI: Yeah. Touching evenly around the head because, you know, back then, they didn't have the manufacturing techniques. A lot of it was done by hand so they didn't have that kind of -- sorry about that -- they didn't have the technology we have today, so now all the companies have all that process, but I mean a lot of people, there's custom drum makers that will go in and...

PATRICK OGLE: Don't want the naked lead singer. [LAUGHING]

MARK TROJANOWSKI: ...cut the angle of the actual bearing edge to like 45 degrees or whatever so you know, obviously, the theory is the more that the bearing edge touches the actual head of the drum, you're going to get a warmer, more fundamental tone. The less you have, it's going to be louder and more explosive.

[SISTER HAZEL PERFORMING]