Bad Sound Quality

 Hello.

I am currently using a Pioneer DDJ-RB and when I am recording mixes live in Rekordbox the audio files I am using (mp3) sound perfect, but when I am uploading my mix to Soundcloud the audio quality is not very good, it doesn't sound clean like it does when I'm mixing in Rekordbox, I have recorded mixes in the past and they've sounded perfect when uploaded to Soundcloud, this is only happening since I've updated Rekordbox.

I am wondering if this is a possible Rekordbox issue? And if there is any ideas on how to fix this, I have already tried fixing the buffer size and that does nothing, I have turned Auto Gain off and that doesn't do anything and I have uninstalled and reinstalled the DDJ-RB drivers and still nothing so any help would be appreciated!

Because what I'm trying to explain is hard to describe here is a link to a mix I made the other month where you can tell the audio is distorted, sounds like the volume is going up and down and overall doesn't sound good: https://soundcloud.com/dundonofficial/mdmh-bass-house-mix-matty-hough-b2b