Seeded Plain is a project of Bryan Day (who runs Eh? and Public Eyesore) and Jay Kreimer with what seems to be occasionally a changing cast of additional performers. The Flying Falling album is the duo of Bryan and Jay. Personally I am very familiar with Public Eyesore which has released music by some of my favorite artists since about 2001.
On Discogs, this is often listed as "Jazz", "Experimental" or "Free Improvisation" which I feel like are pretty generic terms. While sounding unique I hear a lot of Musique Concrète influences. Flying Falling is a slow-moving scrape and dirge with various instruments being played in a non-traditional manner and distorted sounds of metal being rubbed and scraped to build a beautiful sonic experiment. Everything is laid out very well and you can tell the performers have experience in mixing these methods of sound generation together.
This release is extremely chill and relaxing and shouldn't be missed by purveyors of experimental music.