I played around with 4 different audio sources with Audacity, a wonderful free audio editing interface and tool.
My MP3 is really sloppy, but the effects I chose worked well for my audio choices.
1. Savage's Medley, an instrumental by DJ Call Me Like
Source: https://soundcloud.com/callmelike/savages-medley This instrumental is generously provided for download from Call Me Like's Soundcloud. -I added a high-cycle phaser effect, which changes the beat dramatically.
2. Posted, an instrumental by DJ Call Me Like
Source: https://soundcloud.com/callmelike/posted-instrumental Another instrumental, generously provided for download by Call Me Like from his Soundcloud. Pairs well with Savage's Medley. -I used a low pass filter to make this sample more bass-heavy. I also use a fade-in.
3. Do Ya Thang - Andre 3000 and The Gorillaz
Source: https://soundcloud.com/doyathing/doyathing-full-version/s-4hfLu - I use a long fade out here, and I lower the pitch and tempo as well, both only slightly lowered though. - My idea was to slow Andre's vocals down like a chopped and screwed version, ironic because he says something - about others criticizing him for rapping too fast in this free song that Andree 3000 and the Gorillaz - produced for a Converse commercial.
4. Leave House Caribou
Source: I bought this CD, and only used a 9 second sample for this project. -I applied a wah-wah at a low frequency and also reversed the sample, giving it a whole new rhythm. -There is also a significant fade-in and decibel changes.
Here is the final MP3:
Here is a link to the project file