Hello! Welcome back to our module on mixing the lead vocal.
In our last lesson, we outlined the roadmap for a professional vocal processing chain, emphasizing the logical order of effects: Correction -> Dynamics -> Tonal Shaping -> Spatial Effects. We established that starting with a clean, well-prepared vocal is the foundation for a great mix.
Today, we're diving deep into that crucial first "Correction" stage. This lesson will equip you with the skills to apply surgical EQ and a de-esser to clean up a vocal track and tame harsh sibilance. These are the precision tools you'll use to remove unwanted sonic artifacts before you start enhancing the vocal, ensuring that every subsequent processor in your chain is working with the best possible source material.
1. Surgical EQ: The Scalpel for Your Sound
Before we add any shine or character, we need to perform some sonic surgery. Raw vocal recordings often contain problematic frequencies caused by the room, the microphone, or the vocalist's tone. Surgical EQ is the technique of using very precise, narrow cuts to remove these unwanted frequencies without negatively affecting the overall character of the vocal.
The goal is to eliminate things like:
- Low-end rumble: Unwanted noise from air conditioners, floor vibrations, or mic stand bumps.
- Boxiness or Muddiness: A buildup of low-mid frequencies that can make a vocal sound like it was recorded in a cardboard box.
- Harshness or Nasality: Piercing or honky-sounding mid-range frequencies that can be fatiguing to the ear.
To effectively apply surgical EQ, you first need to train your ears to identify these problem areas.
You Are Ruining Your Audio! - How to EQ voice properly
This video from Julian Krause provides an excellent breakdown of the vocal frequency spectrum. It will help you connect specific frequency ranges to the sonic characteristics you hear, which is a critical ear-training skill.
Watch from 03:00 to 07:14. As you watch, listen carefully to the audio demonstrations for boominess, boxiness, and nasality. Try to associate the sound of each problem with the frequency range he is manipulating.
How to Find and Fix Problem Frequencies
The most common method for finding a problem frequency is the "boost and sweep" technique. Since you're comfortable in FL Studio, you can do this easily with the Fruity Parametric EQ 2.
- Set a Narrow Band: In Fruity Parametric EQ 2, select an EQ band, right-click the "Bandwidth" (BW) knob, and select a narrow setting (e.g., "40%"). This is your "scalpel."
- Boost the Gain: Increase the gain of that band significantly, by about +10 dB or more.
- Sweep the Frequency: Slowly move the frequency of that boosted band across the spectrum while the vocal plays. You will hear certain frequencies "jump out" and sound particularly unpleasant or resonant. That's your target.
- Cut the Frequency: Once you've found the offending frequency, reverse the gain from a boost to a cut. Cut by -3 to -6 dB, or as much as needed to solve the problem without making the vocal sound thin or unnatural. Use your ears!
This "Vocal EQ Cheat Sheet" can be a helpful visual guide for knowing where to start looking for common vocal characteristics.
2. De-Essing: Taming Harsh Sibilance
After cleaning up resonances with surgical EQ, the next major cleanup task is tackling sibilance.
Sibilance refers to the high-frequency energy produced by "s," "sh," and "t" sounds. While natural, these sounds can become harsh and piercing in a recording, especially after compression and high-frequency EQ boosts are applied later in the chain.
A de-esser is the specialized tool for this job. It's essentially a frequency-specific compressor: it targets only the sibilant frequency range and turns the volume down only when those harsh sounds occur, leaving the rest of the vocal untouched.
For a clear overview of what sibilance is and the tools used to manage it, let's turn to a short reading.
This article from Sound on Sound, 'Managing Sibilance,' explains the causes of sibilance and introduces the primary tools for fixing it. It will solidify your understanding of the problem before we jump into the practical solutions.
Read the introductory section to understand what sibilance is. Then, focus on the sections titled 'Conventional De-essing,' which discusses static EQ, and the following section that introduces dedicated de-esser plugins and dynamic EQs. This should take about 5-7 minutes.
De-Essing Techniques in FL Studio
Now for the hands-on part. There are several ways to de-ess, and since you know your way around FL Studio, we'll explore two powerful methods using stock plugins.
FL Studio Vocal Mixing - How To De-ess Vocals
The channel In The Mix has a fantastic tutorial that demonstrates three de-essing techniques specifically within FL Studio. We will focus on the first two methods, which are excellent for most situations.
Please watch from 01:58 to 07:56. First, pay close attention to the section on using Maximus as a de-esser. This is a powerful and flexible method that functions like a classic de-esser. Next, watch the section on manual de-essing using Edison. This technique offers the most precision and control, though it takes more time.
To summarize the process for setting up a de-esser like Maximus (or any de-esser plugin):
- Isolate the Sibilant Frequency: Use the plugin's monitor/listen function to solo the high-frequency band. Sweep the frequency around (typically between 5-10 kHz) until you hear the "s" sounds at their harshest.
- Set the Threshold: Adjust the threshold so that the de-esser's gain reduction only activates during the sibilant phrases. You don't want it working on other parts of the vocal.
- Adjust the Amount of Reduction: Dial in the amount of gain reduction (sometimes called "Strength" or "Range") to tame the sibilance. The goal is to make it less harsh, not to eliminate it completely. Overdoing it will cause a lisping sound.
- Check in Context: Always make final adjustments while listening to the vocal in the full mix, not in solo.
Test your understanding!
You've used a compressor on a vocal track, and now the "s" sounds are unpleasantly sharp and loud. You load up Maximus to use as a de-esser. In simple terms, what are the first two steps you need to take to set it up correctly?
Show answer
- Find the problem frequency: I would use the monitor function on the high band to listen to only the high frequencies. Then, I'd adjust the band's cutoff points until I've isolated the harsh "s" sounds, which are usually somewhere between 5 kHz and 10 kHz.
- Set the trigger point (Threshold): I would look at the input level meter for that band and adjust the threshold on the compression curve so that gain reduction only happens when the loud "s" sounds cross it. The rest of the vocal should pass through unaffected.
Conclusion
Mastering surgical EQ and de-essing is a huge step toward professional-sounding vocals. By meticulously cleaning your vocal tracks before you apply creative processing, you ensure that you are enhancing the good qualities of the performance, not amplifying its flaws.
Key Takeaways:
- Surgical EQ is used for corrective work, employing narrow cuts to remove unwanted resonances like muddiness, boxiness, or hum.
- The "boost and sweep" method is a reliable technique for finding problem frequencies with a parametric EQ.
- Sibilance is the harsh high-frequency energy from "s" and "t" sounds, which is often exaggerated by compression and EQ.
- A De-Esser is a frequency-specific compressor that targets and reduces sibilance without affecting the rest of the vocal.
- The goal of cleanup is transparency. The best corrective work is often the work you don't notice—the problems are simply gone.
Preview of Next Lesson:
With our vocal track now clean and free of distracting artifacts, it's ready for the next stage of our chain: dynamic control. In the next lesson, we will learn how to use serial compression (multiple compressors) to transparently control vocal dynamics, giving the vocal a powerful, consistent, and polished presence in the mix.