#1
Hey, just started playing bass, and I don't really know what this means:

H H H h H
||-----r-|----3 mm---||----r-|----2 mm--|----r-r-|----9 mm--|----r-|----
||*-3:-e-|-4:-rest--*||-3:-e-|-4:-rest--|-5:-e-e-|-4:-rest--|-3:-e-|-4:-
||*-4:-s-|-4:-------*||-4:-s-|-4:-------|-4:-s-s-|-4:-------|-4:-s-|-4:-
||-----t-|-----------||----t-|----------|----t-t-|----------|----t-|----


I don't know if the tab will come out all jumbled here or not, but anyway, there's these 3/4's, 4/4's and 5/4's with colons at the beginning of each new section, and I don't know what they mean. Could someone tell me?
#2
It's called the time signature. 4/4 is standard. What it means is there are four beats per measure and a quarter note is considered one beat. 3/4 is 3 beats per measure and a quarter note is considered one beat. 6/8 is a common one with an eighth note as one beat (and 6 beats per measure).
Only play what you hear. If you don’t hear anything, don’t play anything.
-Chick Corea
#3
Oh ok I thought it had something to do with timing. Thanks, now I know. lol.