When asked about the piano sound in Alesso's track "Years", he said he first tried a piano from Logic's own EXS sampler, but then switched to the Pianoteq "because you can really manipulate the piano sound really well." The original source is [this](http://www.musicradar.com/news/dj/alesso-explains-the-making-of-years-567223) MusicRadar interview.more
In his Facebook Q&A, when asked if the piano parts from his album Glorious are plugins or samples, Arty replies: "All of the pianos on the album are VST's. It would be [Alchemy](http://equipboard.com/items/camel-audio-alchemy-software-synthesizer), [Omnisphere](http://equipboard.com/items/spectrasonics-omnisphere-virtual-synth) or Pianoteq with some post processing."more
«I have always been impressed by the results I am able to achieve with Pianoteq. It sounds as natural or as unnatural as I want. Pianoteq's sound editing facilities make it extremely versatile for the modern pianist with an ear to fine audio tuning. I love the slider that sets the condition of the piano from pristine to totally destroyed. The designers have thought to everything, but have managed to maintain a simple interface which never gets in the way of musical creativity. All the add ons sound equally realistic and the other important dimension is the effects section, absolutely wonderful and simple to operate. Another important consideration, the superb responsiveness of this software, that sets it apart from all other virtual pianos. Every style of music that I'm interested in is instantly playable on Pianoteq. I love working, playing and creating music with this incredibly powerful, deceptively simple software.» Performed by Steve Nieve Pianoteq 4: Bluethner (Studio) Pianoteq 4: U4 (Midnight)more
I bought this at whatever version a couple of years ago and was very impressed with the sound but to get the full package it is rather expensive and I have other even more realistic sampled piano libraries so never use this now. Good if you have limited hard drive space as it is modelled and you can buy individual instruments covering modern and antique keyboard instruments and not only pianos but harpsichords, vibes anything in the keyboard family.