Ok, so I want to post some of my recordings on Purevolume. Only problem is, the files are too bloody large. I've got some songs which are 9 or 10 megabytes, and Purevolume has a limit of 8 MB. Is there anything I can do in the recording or editing process to cut down on file size? Most professional recordings are only 3 or 4 MB(at least, the ones I've got are), and I have no idea how that is even possible...

i also really want to know this aswell
My Gear:
Fender American Deluxe Stratocaster
Epiphone Sheraton II
Fender Blues Deluxe Reissue
Teese RMC Picture Wah
MXR Carbon Copy
Keeley Modded TS9
Korg Pitchblack
Schecter Omen 6
Dean Performer Acoustic

compression? just make the files have a smaller bitrate.
Ibanez RG321MH - Weathered Black with an SD Invader in the bridge
Orange Crush 10 watt