Check out our Sonnox Restore audio demos:Ģ. Though the price tag puts it out of the reach of the casual hobbyist, for anyone who does a lot of restoration, mastering or film work, Restore could well be a sound investment and perhaps even an essential purchase. We tried the plug-ins from iZotope RX (the Advanced version of which costs $1199) on the same material, and found Restore to be superior, both in terms of sonic quality and workflow (but note that RX also offers powerful spectral editing functions). We used Restore to salvage material from old cassettes and vinyl, multitrack recordings on two-inch tape (that suffered from 'ghost noise'), and takes that had been infested with mains hum. They've done an excellent job of crafting a well-rounded set of intuitive, versatile tools that's perfect for almost any restoration situation and capable of bafflingly good results - we were able to salvage some audio material that we previously assumed to have been beyond repair. Sonnox spent 18 months on R&D for Restore and it really shows. There's also a De-Hisser section that works independently from the rest of the plug-in, for more aggressive reduction of treble noise.Īll three plug-ins enable you to audition the removed noise events using the Diff button (very handy for making sure you're not removing too much good audio), and they all have A/B functions and undo/redo. As with any denoiser plug-in, extreme noise removal can result in the audio becoming dull and soft, and to this end, there's a Warmth knob that reintroduces some of the 'lost' harmonics. To deal more effectively with noise that's constant in its frequency response, you can play back a section featuring only background noise (eg, between songs on a tape), wait until the plug-in has discerned the noise profile, then hit the Freeze button to 'lock' its profile. The Colour and Air knobs are simpler tools for tweaking the bass and treble response. To influence which frequencies are targeted most aggressively, you can drag points on the display to create a bias curve, eg, to remove more high-frequency noise. This works best when the plug-in knows the frequency curve of the noise (aka, noise profile), and the DeNoiser can automatically calculate this for you if required. This mode can work magic on video footage, and despite being dubbed Dialogue Mode, it's suitable for other restoration situations where you need different settings for loud and quiet events. To fine-tune the way the DeClicker categorises events, there are sidechained low- and high-frequency filters and a real-time spectrum analyser, not to mention a level profile chart, both of which appear at the bottom of the main window. You set the voice threshold control much as you'd set that of a noise gate, so any audio events breaching it are processed with the Above Set parameters, and the others with the Below Set. Thus you can use more aggressive settings on the non-vocal sections without adversely affecting the audibility of the vocal sections - very clever.
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This mode is designed specifically for dialogue restoration work, and works by separately categorising events as dialogue and non-dialogue, then enabling you to process them separately with two full sets of DeClicker controls. "DeClicker's algorithms distinguish between noise events and audio content, the former showing up as colour-coded dots on the graphical display."Īctivate the DeClicker's Dialogue Mode and a bunch of extra controls pop up.
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