This can be quite tricky at first but you will soon get the hang of
it. It's mainly for when you record, so that your mixes sound at the
same level. Everyone hates it when they're listening to a decent mix
and the sound level is going from too loud, then too quiet etc...
Eventually you should learn to get it just right each time so that
the levels are all the same through out.
One fairly easy way is to get a mixer with an equaliser on it, you
know the flashy lights. If you do get them the same level on the mixer
equaliser, the records may still sound too loud or too quiet because
most records are record at different levels.
Eventually you will get it right and have the perfect mix at the perfect