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Bitwig De-Esser Device - Removing Harshness on Vocals and Drums

Bitwig Guide | Nov 22, 2022

The De-Esser in Bitwig Studio acts as a simple compressor targeting high frequencies to tame harsh sounds, with controls for cutoff frequency, filter slope, and gain reduction amount. It lets users monitor what frequencies are being analyzed and adjust how much harshness is reduced, making it especially useful for vocals and elements like hi-hats or cymbals. By adjusting parameters, you can easily control and diminish harshness in selected frequency ranges, giving your mixes a smoother sound.

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Short Overview

I use the De-Esser in Bitwig Studio as a simple compressor for taming harsh high frequencies in my sounds. By setting a cutoff frequency, I can control which parts of the signal are analyzed, and I can even preview what's being affected. Adjusting the amount lets me decide how much of those harsh frequencies get reduced, making it especially useful on vocals or bright drum elements like hi-hats. The whole process feels intuitive, and the visual feedback helps me dial in just the right amount of de-essing.

Introduction to the Bitwig Studio De-Esser

In this video, I explored the De-Esser device in Bitwig Studio, which functions as a basic and effective compressor designed to tame harsh high frequencies in audio. The De-Esser is particularly useful on vocals and any sounds that exhibit unpleasant sibilance or harshness, such as hi-hats in drum loops.

How the De-Esser Works

The De-Esser (De-Esser) in Bitwig Studio is fundamentally a compressor, but it targets only certain upper frequency ranges. Instead of compressing the entire signal, it focuses on frequencies above a threshold that you set, helping smooth out problematic high frequencies that can make a mix sound harsh or fatiguing.

High-pass Filter for Frequency Selection

One of the main controls is the cutoff frequency. This allows me to define the frequency above which the De-Esser starts analyzing the signal. The filter used here is not affecting the whole sound, but simply determines what is analyzed for potential reduction. For example, by setting the cutoff at 4.8 kHz, I can target only the sibilant or harsh frequencies typically found in vocals or cymbals.

There are options to select the steepness of the high-pass filter , from a two-pole to a four-pole filter. A four-pole filter provides a steeper cutoff, allowing for more precise targeting of the frequency range.

Analyzing and Auditioning

Bitwig’s De-Esser offers the ability to preview or monitor what is being sent into the analyzer section. By doing this, I can listen exclusively to the frequencies identified for potential gain reduction. This preview feature is especially helpful for accurately tuning the De-Esser’s sensitivity to harshness.

Gain Reduction and Ratio

Next, the De-Esser’s gain reduction graph visually represents how much reduction is being applied to the signal in the selected frequency range. The “amount” control functions in a similar way to a compressor’s ratio knob, allowing me to set how aggressively the De-Esser reduces the volume of harsh frequencies.

By adjusting this control, I can fine-tune how much the high frequencies are attenuated , from subtle de-essing to very pronounced smoothing. This makes the device remarkably versatile and easy to use.

Practical Applications

Although typically associated with vocal processing, the De-Esser is useful on any audio with pronounced high-frequency content. In the video, I demonstrated using it on a drum loop containing hi-hats, where it noticeably tamed the high-end harshness without affecting the punch and body of the drums.

By auditioning and adjusting the controls, I could easily reduce the volume of frequencies above 4.39 kHz, resulting in a smoother and less fatiguing sound. The gain reduction was clearly visible and audible, enhancing both control and confidence in processing.

Fundamental Concepts Explained

What is De-essing?

De-essing is a type of dynamic audio processing focused on reducing or eliminating excessive sibilance or high-frequency harshness, especially in vocal recordings. Traditional de-essers use a frequency-dependent compressor , similar to what Bitwig Studio’s De-Esser is doing.

Importance of Frequency Selectivity

By isolating and only compressing the problematic high frequencies, a de-esser preserves the fullness and clarity of the original sound while eliminating harsh peaks. High-pass filters with selectable steepness allow even greater accuracy in targeting the exact range needing control.

Visual Feedback in Modern De-essers

Many contemporary digital de-essers, including Bitwig’s De-Esser, provide real-time visualization, helping users quickly see and understand the effect the processor is having on the audio signal.

Conclusion

To sum up, the De-Esser in Bitwig Studio is a streamlined but powerful tool for managing harsh frequencies. With its intuitive controls for frequency targeting, previewing, and gain reduction, it serves as both an effective de-esser for vocals and a general tool for taming the high-end in any sound source. Its simple compressor-like operation and real-time feedback make it both accessible and precise, fitting seamlessly into any audio mixing workflow.

Full Video Transcription

This is what im talking about in this video. The text is transcribed by Whisper, so it might not be perfect. If you find any mistakes, please let me know.
You can also click on the timestamps to jump to the right part of the video, which should be helpful.

Click to expand Transcription

[00:00:00] The De-Esser of Bitwig Studio is actually a small little compressor
[00:00:04] for high frequencies for harsh sounds, if you will.
[00:00:08] And you have like a cutoff frequency here
[00:00:10] where you can change what goes into the analyzer part.
[00:00:13] It's just a high pass for the analyzer.
[00:00:16] So you can say, I want only have frequencies above
[00:00:20] 4.8 kilohertz going into the analyzer part.
[00:00:24] Then you can monitor what's going into the analyzer part
[00:00:27] here. So you can preview what's getting analyzed.
[00:00:30] And you can change the high pass type here
[00:00:33] from a two pole filter to a four pole filter.
[00:00:36] If you want to have more like a steep filter cut here,
[00:00:39] you can choose this here.
[00:00:40] Then there's a gain reduction graph here
[00:00:43] where you can see how much dB there is actually
[00:00:46] getting removed from the signal in this frequency range.
[00:00:51] And you can change the amount.
[00:00:53] This is basically probably the kind of ratio.
[00:00:56] So you can change how much the gain reduction is applied
[00:01:00] to the signal, how much gain you want to reduce
[00:01:02] from the harsh frequencies.
[00:01:05] So this is basically the De-Esser.
[00:01:07] And it's mostly used on vocals, of course,
[00:01:10] and maybe probably on sounds that have harsh frequencies,
[00:01:16] like drums, the hi-hats maybe.
[00:01:18] So I have this here on drums.
[00:01:22] So this is how the drum loop sounds.
[00:01:25] [MUSIC PLAYING]
[00:01:27] Just some hi-hats in there, right?
[00:01:29] You put this De-Esser on there.
[00:01:31] You can preview here what's getting analyzed.
[00:01:37] And then you can increase the amount here.
[00:01:39] And you can see some of these frequencies above 4.39
[00:01:43] kilohertz are getting removed or reduced in loudness.
[00:01:46] [MUSIC PLAYING]
[00:01:50] You can preview here.
[00:01:53] So everything you hear now is basically pushed down in loudness.
[00:01:57] [MUSIC PLAYING]
[00:02:00] So yeah, you can see it kind of a small little,
[00:02:07] super small, easy compressor.