If you mean strictly electronic releases done by otherwise metal bands, Beherit's "Electronic Doom Synthesis" and Ildjarn-Nidhogg's Hardangervidda parts 1 & 2 are my favorites. Traditional releases by these bands pair nicely with these, as they highlight the similarities between otherwise chaotic, minimilastic black metal and the music of groups such as Tangerine Dream.
Burzum did some albums in this style, as did Fenriz of Darkthrone (under the Nepture Towers banner) - but I think these albums are rather boring.
|