The world standard for dialogue noise suppression

CAM1: DNS Dynamic Noise Suppressor

Noise suppression is needed to clean up noisy dialogue for film production, to suppress ambient noise for live TV and radio broadcasting, to revitalise sound effects libraries, and to enhance speech for forensic audio investigations. Until recently, this meant using conventional filters, noise gates, dynamics processes, or processes developed from analogue encode/decode noise reduction systems. But these proved to be inadequate, so we developed the Academy Award winning DNS process to remove the rumble, the hiss, the whistles, the broadband noise and the shot noise from contaminated sounds. DNS splits the signal into a large number of well-defined bands, and sophisticated digital filters then analyse each of these, suppressing the noise independently in each. The innovative design of the filter bank allows you to control the DNS process using relatively few controls, making it simple and quick to use in all situations.


At first glance, the latest incarnation of DNS appears to be identical with previous versions, but its secret is revealed by the LEARN button that has appeared at the bottom left of the control panel. A further development of the groundbreaking algorithm contained within our award-winning DNS 8 Live dialogue noise suppressor, LEARN allows DNS to calculate a remarkably accurate adapting estimate of the background noise 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 it to take a snapshot of existing conditions and then fine-tune the parameters, but its real power lies in leaving it switched on so that it can adapt to changes in the background and surroundings. It not only adapts in a 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.


If you work with film dialogue, the speed, flexibility, and ease of use of DNS provides solutions to audio problems that you could not previously solve. And, with eight, 96kHz channels of the DNS algorithm in a convenient, automated format, it's the standard for multi-channel post-production in the film, video, and TV industries. Elsewhere, in the audio forensic laboratory, DNS is ideal for removing motor noise from small covert recorders, for eliminating electrical interference, and for helping to clean up recordings suffering from unfavourable acoustics and poor microphone locations.

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