iZotope RX4. Must-have software for audio editors

iZotope RX4. Must-have software for audio editors

Are you kidding me!!

I just used the iZotope RX4 plugin for the first time on an audio mix and it is ridiculously, over the top, awesome. I’m not just saying this to thank the folks at iZotope for sending me a copy to try out, I’m saying this because cleaning up dialogue and narration is a time consuming often laborious task that the RX4 handled with ease, and the tracks sounded fantastic!



When a piece of software comes out that works, and I mean really works, I want to share that product with anyone who will benefit. Here’s what just happened to me that’s gonna change the way I approach cutting dialogue and narration.


I was cleaning up a narrative for a show I was cutting, you know, volume nodes up and down to clean out breaths, tongue clicks, lip smacks, and studio background noise, when it occurred to me as I finished up that I had received a copy of iZotope’s RX4 software that’s designed specifically for this purpose. So just for kicks, I grabbed a section of unedited audio, dumped it into an empty track, opened the RX4 plugin, clicked on “Dialogue Denoiser” and with a couple unambiguous adjustments all was done! I couldn’t believe it! I had just spent over an hour meticulously cleaning narration, and this plugin, I hate to admit, did a better job in minutes!

The results were impressive to say the least. I spent another hour messing with a couple other plugins the RX4 comes with and they were just as simple to use and did a great job at what they are aptly named.



Here’s a list of the iZotopes RX4 plugins:

  • Declicker
  • Declipper
  • Decrackler
  • Denoiser
  • Dereverb
  • Dialogue Denoiser
  • Humm Removal


If you think I’m blowing smoke up your skirt, download the free 10-day trial version https://www.izotope.com/en/products/audio-repair/rx and decide for yourself.



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  1. BobA
    June 20, 2015, 12:31 pm   /  Reply

    I picked up a copy of RX4 a little while ago and it has rapidly become one of my favorite repair tools. Definitely good software. The pro version is a bit pricey but worth it for the extra modules.

    Have you tried the loudness matching? I thought it did a pretty good job at getting the levels to standards.

    • Dean Miles
      June 20, 2015, 1:41 pm   /  Reply

      It’s an amazing piece of software and super easy to use. I haven’t used the level matching yet. I’m a little old school when it comes to compression and volume levels. I’ll give it a go and let you know what I find out.


  2. Dinu
    September 1, 2015, 11:36 am   /  Reply

    I demoed the RX4 but I found it cumbersome to get fast and good results.
    Unfortunately I work on a really tight budget and timeframe so the RX4 as great as it was something I could skip because luckily I found a great alternative (Acon Restoration Suite) that is faster and cheaper (sound quality is pretty good also maybe not as great as RX, and it lacks the advanced functions that iZotope’s offering provides).

    So I’m curious if you ever have the time to compare these two head to head what is your opinion on them, because I imagine there are a lot of users in a similar position to mine reading your blog that would love an alternative.

    Looking forward to the moment that I will dive deeper into RX4 for all of those advanced functions but for now I can definitely deal with this alternative.

    Thanks for the reviews and info!

    • Dean Miles
      September 3, 2015, 9:16 am   /  Reply

      Dinu I haven’t tried the Acon Restoration Suite but it’s nice to know there are alternatives. I’m a bit, actually very old school! I prefer to work my audio tracks the old way with EQ, compression, side chaining and good old splicing. I was shocked at iZotope’s dialogue de-noiser. It’s a pretty easy fix when you’ve got a lot of problem field recordings (not my field recordings ;)!

      Thanks for sharing.

  3. John Gordon
    December 3, 2015, 12:29 pm   /  Reply

    Is the RX4 a package for our situation?

    I’ve been scoping the RX4 package for our shop. We record good audio but feel like it can get so much better. We create instructional videos for university classes moving to the online environment. So we are not Hollywood. However, we are always pushing to create better quality even if the learner doesn’t exactly need it. We are jack-of-all trade type folk. Small shop. Plenty of work. Usually not a lot of time. We have CC Audition and use it only on a limited basis.

    • Dean Miles
      December 6, 2015, 8:48 am   /  Reply

      Hey John, Dean here.

      I use the RX4 on every post production job I do. I first tried out the trial version to see if it was software that made sense to me and was easy to use. The last thing I wanted was a cumbersome audio editing tool that had a steep learning curve. After about a half hour with the trial version it was clear it was going to be easy to use.

      Now that I’ve been using it for over a year and had to use it to repair some pretty messed up dialogue tracks, I would highly recommend it.


    • Bob A
      December 6, 2015, 5:59 pm   /  Reply

      Heya John,

      I’ve been using RX4 (and now RX5) for about 6 months. If you can fit it into your budget I would definitely suggest going for it, particularly RX5. One of the new features with RX5 is the ability to add different modules into a chain. For many of my audio files I just load them up and run them through my pre-configured chain and they are done. On occasion I need to play around a bit after the chain to get things exactly right, but by and large it sounds great after one pass.

      One of the other really nice features (which now Adobe supports) is loudness maximizing. This allows you to make sure that your files are at maximum loudness while still within broadcast spec, a super-handy tool.

      There are lots of other tools and goodies lurking within RX4/5. I suggest you try a demo and see how it works for you.


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