Propellerhead has announced public beta for Reason 8.3 on June 9th. Here's the details that they've supplied:

About Reason 8.3
Reason 8.3 is a free update for all users of Reason 8. It's entering public beta testing on June 9, 2015 and will be released to the public on June 30th.

The highlight of this release is an update of Reason's RV7000 reverb with convolution reverb capabilities, plus improved browsing features and more.

Access and upgrades
Reason 8.3 will be available as an automatic, free update to all users of Reason 8.2. Other Reason 8 owners can download the update from Propellerhead's website when it's released. Owners of Reason 1-7 can purchase the Reason 8 upgrade and be automatically updated to Reason 8.3 when it's released.

More information:

• Propellerhead

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