After Liquid Liquid disbanded in 1985 Dennis continued to record electronic music at his home studio in Edison,New Jersey but decided to mix the songs for "Concepts" at another studio in order to have another set of ears to help with the mixes.Dennis teamed up with Andy Gomory, a true talent, a keyboardist and arranger, and hit it off immediately. Andy played drum machines and keyboards and Denis played percussion, keyboards, & guitar and both sang. When they parted ways in the late 1980's Dennis decided to add both drums and percussion as well as overdubs from guest musicians - many of which are included on this album. The albums timeframe ends in 2004. The later recordings have a jazz feel to them yet still had dance music elements mixed in. The title track "Primitive Substance" really sets the tone as you hear the great playing of Michael Gribbrook on Frugel horn/Trumpet and Gerry Carboy on bass. Also, "Forgiveness" has David Axelrod (not the famous one) playing beautiful melodic bass guitar thru out.