so ive written this new piece of music, and im currently editing it to get more ambience like the rest of the (utter) crap i put up, its a first for me writing piano, and i couldnt put the song on my page because its too large, if anyone can help, please comment. it says i need to encode it as slower, but i have no idea what that means...
What file type are you trying to upload it at?

I think the spec of UG is mp3 @ 128kbps. So basically when exporting the track for saving it, make sure you're saving it as an mp3 file with the bitrate of 128kbps. Alternitavely you can go to media-convert.com and convert the current file there and it will automatically go to an mp3 @ 128kbps.