Stems are simply the channels bounced down to audio files. Splice Contests. Splice Contests are a great way to gather song stems. ... Wavo. Wavo.me will run contests for remixes from time-to-time. ... Skio. Skio's remix contest features some of the most well-known songs on the web today. ... Reach Out To Labels. ... Traxsource. Oct 30, 2017