Balance Mastering tells us that they have created a free impulse response set of the NSA listening tower at Teufelsberg, Berlin. This is the story in their own words:

Amidst increasing concern about data privacy and how our personal data is being handled we bring you a bit of sonic surveillance history: a set of reverb impulse responses allowing you to use the acoustics of the main listening tower at the former NSA compound, Teufelsberg, in your own productions. The Teufelsberg towers are famous to any Berlin visitors seeking an alternative touristic sight and a breathtaking view of the city. Prior to the fall of the Berlin wall the compound was run by the American and British military with the main objective being to intercept and process any Soviet and East German communications as part of the ECHELON intelligence gathering network. You can find some excellent historical information here, and in a micro-documentary made by Vice in 2010.

We've recorded the impulse responses with great care and mastered and tweaked them to be useful in a wide variety of situations. There are six (quite different) variations to experiment with and fit to your source audio. Finding an opportunity to approach the towers and record the impulses was tough, not to mention having to climb and squeeze through a tiny gap to reach the uppermost tower, so we hope you enjoy incorporating a piece of Cold War history into your music and audio productions.

Pricing and Availability:
Free.

More information:

• Teufelsberg Impulse Responses

• Towering Berlin Reverb For Free 08-Feb-17