1. Lower the volume slightly before "splitting stereo to mono"Sometimes loops are a bit...
too loud, causing in severe clipping and distortion making the loop sound terrible.
Simply slide the slider to the left slightly
before splitting to mono. (You could do this afterwards too, but it's just easier this way since it sets both channels to whatever you lowered it to.)
Anything from -9dB to -5dB is fine. I prefer -6dB.
2. Try testing how it sounds with one channel muted.Sometimes the channels conflict with each other and might make something sound too quiet or too loud, or it could rape the quality of your loop. Try muting one channel and see if it sounds any better.
Be sure if you used the method above that you raise the volume back to normal, or else your loop will be too quiet.
You can then delete the channel that is muted if it sounds better.
3. OGG quality 5 is best quality.OGG Q5 is best since it reduces filesize while maintaining audio quality.
The higher the quality, the higher the filesize, the longer it takes for someone to download your loop on a server. And we all know this can take a while sometimes.
Most loops end up being ~86kbps.
On the song I tested, Q0 outputted a 48kbps OGG, Q5 outputted an 86kbps OGG, and Q0 outputted a whopping 206kbps file, doubling Q5's filesize and quadrupling Q0's filesize.
tl;dr Q5 is best, trust me.
You might notice that I don't use the usual "cut that part out" method. I simply select a part of the song or whatever I'm looping and use a trial-and-error method with what I have selected, shift+playing it back.
I'll throw some more on here if I find anything, or if anyone has any other tips to offer.