Asalamu alaykum, is electronic music (e.g. Dubstep) haram? It is mainly made using computer sounds that cannot be played by musical instruments.
Let me start with an example. Just because Heroin and Cocaine weren't there at the time of Prophet(pbuh), it doesn't mean it isn't covered by Shari'ah. Since they too turn the people insane just like alcohol, they are automatically condemned.
It was narrated from Abu Malik Ash’ari that the Messenger of Allah (ﷺ)said:
“People among my nation will drink wine, calling it by another name, and musical instruments will be played for them and singing girls (will sing for them). Allah will cause the earth to swallow them up, and will turn them into monkeys and pigs.”
You fail to understand the motive behind condemning musical instruments in Islam. The motive is nothing but the music alone. It is just like liquor which is banned due to its intoxicating nature.
So ultimately it doesn't matter whether the music comes from real instruments or virtual instruments (softwares). Only thing matters is the music which is condemned (haraam).
And of mankind is he who purchases idle talks (i.e.music, singing, etc.) to mislead (men) from the Path of Allah without knowledge, and takes it (the Path of Allah, the Verses of the Quran) by way of mockery. For such there will be a humiliating torment (in the Hell-fire).
Translation by Muhsin Khan