Tame Problematic Frequencies With a Resonance Suppressor

One of the most time-consuming audio processing and mixing tasks is the taming of harsh vocal and instrument frequencies. Traditional processors such as EQs, de-essers, and compressors commonly tackle this. However, in recent years, we have witnessed the rise of new and fascinating tools that combine the power of all of them. In the following tutorial, we will show you how to use one of them: a resonance suppressor.

As usual, we have prepared a short pattern in our SoundBridge: DAW. It contains most of the elements of a full mix. Let's listen.

As we can hear, the guitar harmonic sequence has many dominant resonances that make the overall frequency spectrum of the track overwhelming. This also pushes all the other elements in the mix into the background. Additionally, some of the high frequencies in the rhythm section are rough and could be treated.

An alternative and modern approach is using a dynamic resonance suppressor. From a relatively new line of similar tools, dynamic suppressor effects integrate an equalizer, compressor, and de-esser into one unit.

In our case, we chose an effect called Soothe2 by Oek Sound. Nonetheless, there are more alternatives out there that you can check out. Let's play by placing a new instance on the guitar channel.

The Soothe2 Resonance Suppressor

Although the GUI looks like it, Soothe isn't unique. Instead, "EQ-like" controls have been commissioned for intuitive control. Soothe 2 comes with six bands, or "node," as they call it: high pass, low pass, and four parametric bands.

When you pick each node, corresponding controls at the bottom of it will appear. The resonant suppression increases by turning up the "Sens" control and, thus, eliminates the harsh resonance for that particular band.

In the same area, we can see several other controls. The most noticeable is “Dept". The Depth knob acts as the core control on how much of the total processing should be applied to all boosted nodes.

Two options for processing modes can be found just above the Depth knob. These two modes decide how the Depth control will influence the audio. Each category is relatively self-explanatory.

"Sharpness" and"Selectivity" expand on the Depth control and help dial the optimal level of suppression. In the former, higher values will allow for narrower notches, and lower values will work for more of a broadband control. The Selectivity control makes this plugin act more naturally and less surgically on lower values, while higher values suppress the most resonant of the frequencies only.

The attack and release functions are identical to a compressor, allowing precise tweaking of when the suppression snaps and tames and when it releases.

After this brief introduction of Soothe2 and its primary controls, let's share how our guitar sequences sound before and after processing.

Now that we have our guitar let's go to the drums. In this case, there is no need to apply such drastic processing, so we will choose the “Soft" mod," which is enough to reduce the harsh resonances of the hi-hat and some of the drums, which seem too punchy. Let's listen to the drum group before and after processing.

Lastly, listen to the full mix with the unprocessed guitar and drum group, and then with the suppressor effect added to both.