Analogue Bubblebath Vol I was the first EP released by electronic musicianRichard D. James under the alias of The Aphex Twin on the 1991 issue, and AFX on subsequent issues. It is the first release in the Analogue Bubblebath series. It was reputedly first put together by James at age 17.
The songs "Analogue Bubblebath" and "Isopropophlex" can be found on the R&S Records compilation Classics. "Isopropophlex" appears in a longer form titled "Isoprophanol" and "Analogue Bubblebath" is extended by a few seconds of additional ending (titled Analogue Bubblebath I). Tom Middleton collaborated on "En Trance to Exit" under the pseudonym Schizophrenia.