What's the convention for the pitch?

Hi,

When programming the pitch of the drums, especially the Kick, Snare and Toms I’m not sure what is the initial pitch of the drum.

After clearing the kit, what is the pitch of the Kick, Snare and the Toms?

I most of the time tune the drums by ear, but sometime I’d like to be certain of the harmony I’m introducing.

Many thanks guys!
Alex