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 EP consists of four tracks, all done in the acid house style which was popular at the time. It was released in 1991 on vinyl by Mighty Force Records, and by TVT Records in the USA in 1994 on both CD and 12" vinyl formats. The tracks "Analogue Bubblebath" and "Isopropophlex" can be found on the R&S Records compilation Classics. "Isopropophlex" appears in a longer form titled "Isopropanol" and "Analogue Bubblebath" is extended by a few seconds of additional ending titled "Analogue Bubblebath I".
Tom Middleton collaborated on "Entrance to Exit" under the pseudonym Schizophrenia. On the UK issues "Entrance To Exit" is misprinted as "En Trance To Exit", this is fixed on US issues.