In memory of Tina Hibbins, an amazing noise/experimental artist, I was given a random soundfx from one of her library CDs (see pic).
I got one called "Cow Barn" which is self-explanatory. I put some delay and tremolo on it, and did the same for my guitar over a C#11 to A#11 vamp. Melancholic mood.
You can have a listen to it here.