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The display defaults to the standard waveform view.

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The editor

So far we’ve only looked at the individual restoration modules, but it could easily be said that RX’s edge is in its purpose-built editor.

The main window has two visual modes, which you can fade between. The first is the regular waveform view, which we’re used to seeing in virtually all wave editors, with amplitude on the vertical axis.

The alternative is the most advanced spectrogram we’ve ever seen, enabling you to select and isolate any frequency at any specific time for discrete processing. Often, you don’t need to use the restoration modules because many tasks can be carried out easily using the main edit window to select (and even solo) the most specific areas, which can then be processed with gain or EQ.

You can also process such selections with the full-blown restoration modules, of course, and with the plug-in versions of RX now available, there’s yet more flexibility.

Advanced option

Everything mentioned so far applies to the standard version of RX, but RX Advanced ($1199) is for those who require further control over their audio. It includes iZotope’s MBIT+ dithering panel; the 64-bit SRC resampling panel; advanced manual de-clicking; multi-resolution de-clipping; multi-resolution spectral repair modes; and advanced Denoiser parameters, all with a plethora of hardcore options.

The vanilla RX will suffice for most scenarios, and offers good value for money, but the Advanced version could prove essential for those working in pro mastering, or fields such as police investigation, where increased voice intelligibility might save the day.

Hear evidence of RX's greatness by listening to this vocal clip before and after treatment:

Before

After