There is more than one artist with this name:
1) a Serbian Industrial metal band
2) a Japanese rock band
3) a Hamilton, Ontario classic rock/rock original and tribute band
4) a Belgian rock band [AC/DC Tribute]
5) a Hungarian electronic one-man-band http://music-playground.net/artist/highvoltage/
There are at least three acts under Edison name: 1) American rock band, Edison,
2) Misteriouse one man act from Japan, responsible for the animated adaptation of the BLACK LAGOON manga, EDISON.
3) Australian skramz/post punk band from Woodend, Victoria. 1) Edison: Ethan Isaac — Vocals Jonathan Svec — Guitar Joel Kelley — Guitar Todd Budich — Drums Anton Kreisl — Bass Edison, like their namesake, strives for invention and passion in the music they create. Their sound and unique lifestyle, is roots-based and hard-driving.
Heidi could refer to: 1) a Danish singer and songwriter, know form the Danish edition of X-Factor. 2) an all girl rock band from Boston, Massachusetts that started in 1999 and dressed like a punk rock field hockey team. They released 2 demos before moving out to California to "make it big" and promptly broke up in 2002 having recorded a full-length album, but never released it.