There are several artists under the name "ESP". See this list.
1. A heavy metal band from USA http://www.metal-archives.com/band.php?id=1928
2. Midwest acid and techno artist Woody McBride http://www.discogs.com/artist/DJ+ESP?filter_anv=1&anv=ESP
3. ESP, a Psytrance/Goa duo formed by Boris Blenn & Olli Wisdom, also somtimes credited as Space Tribe & Electric Universe or Electric Universe + Space Tribe, and variations.
4. ESP - Eric Singer Project.
5. An incorrect tag for The Electric Soft Parade. If you are listening to Electric Soft Parade with music tagged as "ESP", please fix your tags.
6. ESP - Hailing from South Wales, ESP brings together ambient, electronic soundscapes: http://www.esp-music.co.uk/