SOR (Sounds of Revolution) is a German sound design studio founded by Oliver Schmitt. The label produces commercial sample libraries, synthesizer presets, drum loops, basslines, and field recordings aimed primarily at electronic music producers working in techno, house, minimal, melodic techno, tech house, and dub techno.

Schmitt has built sound content and presets in collaboration with companies including Steinberg, Arturia, reFX, Xfer Records, Twisted Tools, and D16 Group, and co-developed the PunchBOX kick-drum synthesizer with D16. SOR product lines include the Modular Clicks & Noises series, Grooving Particles, Drum Revolution, and the wide-ranging SOR Ultimate Bundle, alongside an ongoing free sample collection.

The catalog is distributed worldwide through Resonance Sound, a label Schmitt co-founded in 2011, as well as third-party retailers across North America, Europe, and Asia-Pacific.

SOR has 2 products cataloged on Equipboard, including House - General and Drums. Their gear is featured by 2 artists, with the strongest followings in Electronic. Notable users include Tiësto and Blank & Jones.