Propellerhead Software has announced that Reason 4 will be available worldwide through Propellerhead’s online store, the PropShop, as well as through retail stores and online stores starting on September 26th, 2007. Upgrades will also be available for previous versions of Reason.

Reason 4 features Thor, a brand new Polysonic Synthesizer; RPG-8, a new arpeggiator; ReGroove, a real-time groove mixer; and a newly designed sequencer.Check out our in-depth Reason Sneak preview, and find out why some Synthopia readers are psyched about the upgrade, while others are frustrated that Reason will still be missing a lot of features found in other sequencers/software studioes.

Pricing:

Reason 4: MSRP is EUR 449 / USD $499.
Upgrades: MSRP EUR 99 / USD $129.