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The world’s standards for dialogue noise suppression in film and TV post, DNS One and DNS Two offer the Academy Award® winning noise suppression of the DNS1000 and its successors, but adds CEDAR’s unique LEARN capability that allows the processes to adapt continually to changes in the noise, even when the wanted signal is present.

They make unusable interviews intelligible, save huge costs in ADR, and have rescued dialogue for countless movies. In the words of one member of the Academy of Motion Picture Arts and Sciences, DNS was “probably used on every major movie coming out of Hollywood in the past couple of years”, and can now be found on virtually all dubbing stages worldwide.


A further development of the groundbreaking algorithm contained within our award-winning DNS 8 Live dialogue noise suppressor, LEARN allows DNS One and DNS Two to calculate an adapting estimate of the background noise level and determine suitable noise attenuations at each frequency for optimum suppression.

LEARN is NOT a noise fingerprint, and you do NOT need to find a section of the audio that contains little or no wanted signal to take a noise measurement. Yes, you can use LEARN to take a snapshot of existing conditions, but its real power lies in leaving it switched on so that it can adapt to changes in the background and surroundings. You might wonder whether this adds latency, or whether it risks eating into the wanted speech signal, but DNS One and DNS Two retain the zero latency they has always boasted, and LEARN not only adapts in a tiny fraction of a second to changes, it differentiates between the wanted signal and the noise so that you obtain superb noise suppression at all times.

Academy Award

In February 2005, the Academy of Motion Picture Arts and Sciences honoured CEDAR Audio’s engineers with Sci-Tech Academy Awards (Technical Oscars) for services to the movie industry. Already a studio standard for eliminating background noises such as traffic and air conditioning, the original DNS, the DNS1000, had already won SSAIRA and PAR Awards in 2000 and 2001. Thousands of DNS1000s, DNS1500s, DNS2000s and DNS3000s are still in use today in post houses, broadcast studios and many other audio environments.