How. Did. You. Do. This.
HOWDIDYOUDOTHIS
howdidyoudothis

Watch this space to see if I even have dropbox room left to upload the sources
[edit: I do]
Based on some example gyms made on the old FT forum of pedal tones where he put a pedal B and played Cmajor stuff over it and it was super nice.
Made using RD4Groovebox app for android. Dev is "mikrosonic". Recorded a wav and beefed it up a little in audacity.
https://www.dropbox.com/s/xzwtpwx7ashasa9/SnowTones.rar?dl=0