The Broadcasters' Desktop Resource

The SMooth Microphone Processor

Mike Erickson author

[October 2023] As with speakers, professionals select microphones based on their preferences and efforts to create a signature “sound” product. When their favorite microphone is combined with the right pre-amp processor, the result can be quite ear-pleasing.

One size fits all.

It is an old term that has been familiar in the broadcasting industry for a long time. You wanted a console, you had four or five sizes to choose from, and that was it. Audio processing? You had to hack the box to make it sound the way you want.

The same could be said of microphone processing. A couple of decades ago, you were rolling your own.


Then came the age of Valley People and Symmetrix, and a microphone processor was at home at most radio stations worldwide.

However, the algorithms in the microphone processor were not explicitly tuned for any one type of microphone. A set of controls was given to the user, and they had to understand the microphone’s characteristics to set them correctly.

Thus, it was intriguing when Angry Audio tossed its hat into the ring of audio processing a little while ago, announcing they were coming out with a mic processor for a specific microphone, the Shure SM-7B.

I own an SM-7B and am a big fan of the SM-7B microphone. When I was at CBS Radio in New York, we installed them at all the stations in the cluster, including WCBS-FM. And those who watch the documentary about Z-100 in the 80s on YouTube will see plenty of SM-7B love as Z-100 was outfitted with a bunch of them.


It did not take long for me to arrange a demo to see what Cornelius Gould and Mike Dosch had come up with – and see if it was better than the venerable (and now unobtainable) 528E I voicetrack with every day.

Angry Audio Smooth Microphone Processor
Angry Audio SMooth Microphone Processor

The first thing I heard out of the box and after setup was what I did not hear.

There was a definite lack of hiss in the pre-amplifier.


Those who know the 7 family know it needs a lot of gain, and some pre-amplifiers cannot keep up, so Cloud Lifter has become part of the voiceover lexicon.

So, as soon as I unpacked it, I interfaced the SMooth directly into the production studio console in the same fashion as the 528E’s output, adjusted the input for 3 to 4 bars of gain reduction (that ought to do it), and set the output for more than enough level into the console.

Then, without adjusting anything else, I had a “whoa” moment talking into the Shure.


It was like being introduced to an old friend for the first time again.

To repeat: I had not made any adjustments, and what I was hearing already had more heft and life than the 528E.

I played with the controls – the De-Esser and Gate are some of the best I have heard in any processor –  and then set out to voice-track my afternoon show. Of course, to hear the progress immediately, I threw in a few tracks on the air late at night so I knew what to expect the next day.

Up against advertisements that had been recorded with the 528E – which, do not get me wrong, sounded good – the SMooth brought me up front and added weight to my voice. I was not crunched. I was not squashed. It was just right. I went to bed, thrilled with the sound of everything.


I used the SMooth for the next couple of days in production.

Finally, I went to take it out and, upon protest, said it would be back Monday. But first, I wanted to make some test recordings at home of the SM-7B (1) flat, (2) with my dbx microphone processor, and (3) with the SMooth. The dbx microphone processor I have at home is about a year old and is not on 24/7, so it is still relatively at spec.

As I listened, I appreciated the sound of the dbx microphone processor and was reminded why I liked it better than the 528E. Then I recorded audio clips of the microphone without processing, with the dbx and then with the SMooth, reading the same copy in all three samples.



With the same settings I had in the production studio, the SMooth was the winner.

Using the controls on the dbx, I could mimic the SMooth to give me the heft, but that came at a price of very aggressive compression, which was a show-stopper.

My only minor beef is that the controls are different than expected. For example, the pre-amplifier gain is all the way to the right side. But honestly, I am nitpicking at this point, and two minutes with the device and you will be at home with it. Cornelius’ algorithms do the magic, and the voice literally comes to life.

Finally, there is a microphone processor that brings out the best sound from a specific microphone.


In short, magic can happen when all the algorithms are carefully tuned in DSP for the response of a particular microphone.

Check out Angry Audio’s site for mounting hardware to have two side-by-side in a 19”-1RU rack space.

Angry Audio Smooth Microphone Processor mounted side by side
Angry Audio Smooth Microphone Processor side-by-side mount

And coming soon, there also will be a sister microphone processor – the REbel – for those who prefer the Electro-Voice line.

If you are an SM-7B house or a voiceover talent that likes the SM-7B (or the SM-5) the SMooth should be your radar.

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Mike Erickson has extensive experience in audio processing at CBS and Wheatstone. He now enjoys working in a small mid-western market doing production, voice tracking, and audio processing support. You can contact Mike at

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