Shorter clip

I posted a few weeks back about making short clips with garage band and never got an answer taht helped me, no offense to the people who responded.

I'm going to try and rephrase the question as best I can.

How do you make and export a sound clip shorter than 8 seconds long?

I cant make my sound bites any shorter than 8 seconds, they alwase have dead air at the end.

if somone would be so kind as to walk me through how to do it step by step I would apreciate it.

C.M.