This M-Audio Keystation 88es 88-key MIDI controller is how Avicii writes his chords and melodies, and is his primary MIDI keyboard controller. This is from the article, [In Pictures: Avicii's Stockholm studio](http://www.musicradar.com/news/tech/in-pictures-aviciis-stockholm-studio-508635).more
As for the hardware part, got a couple Pioneer SDJ-08 monitors, Beyerdynamic DT770 Pro Headphones, AKG Perception 220 condenser microphone, Roland R-05 Wave/MP3 Recorder, M-Audio Keystation 88es, KORG Monotron and Monotron Delay, M-Audio Fast Track Ultra, and a custom made chiliGREEN laptop which pretty much works as a desktop replacement. It's a monster!more
I've had this keyboard for almost 15 years and I still use it regularly. I wouldn't compare it to my S88, but for the price, it's the best 88 key I've ever come across.
Cheap, affordable, and its got full 88-keys. Semi-weighted so i can semi-feel like I'm playing a piano. And there really isn't anything more to it than that. Its simple and i like it.