There are at least two artists named Discordance: (1) Discordance a Finnish metal-band combining different types of metal - and anything between. Crunchy riffs, beautiful melodies and even a little touch of blues here and there. See more at http://www.discordanceband.com.
(2) Discordance is a dangerous mixture of violent power electronics and cold death industrial sounds. This italian project was well-known for his devastating CD release on Crowd Control Activities, "Supremacy" (1996).