Reply to S4 Recording Issue

Hey guys,
I've had my S4 since it came out, but have always been wondering about the sound quality of my recorded sets. I can hear them at full blast when I'm recording it.
Here is the kicker, when I burn my set to a CD or play it on my laptop, the sound is super low. Even if I turn it all the way up it's not half as loud as when I recorded it.
Any ideas? Help? Suggestions?
Thank you.