Emilie Meyer
White noise is a powerful tool for sound design, and it can be used to improve sleep quality and productivity. It refers to a noise that contains all frequencies across the audible spectrum in equal measure. In music production, white noise can be manipulated using various techniques such as panning, filtering, layering, and modulation to create unique textures and sounds. Panning, specifically, allows for the control of stereo placement, enabling producers to position the white noise in the desired location within the stereo field. This can be achieved using tools like Serum, a versatile synthesizer plugin with a dedicated noise oscillator, or through experimentation with different effects and parameters.
Characteristics and Values of White Noise
| Characteristics | Values |
|---|---|
| Malleability | Can be manipulated using filters, effects, layering, pitch, automation, etc. |
| Sound | Similar to the static that comes from an untuned radio or television |
| Use cases | Blocking out background noise, improving sleep, aiding relaxation, creating a noise-free environment, enhancing music production |
| Sources | White noise machines, apps, synthesizers, plugins |
| Cost | White noise machines: $50-$100; White noise apps: Free or low-cost |
| Volume | Should be similar to background conversation or light rustling; Not exceed 70 decibels to avoid hearing risks |
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What You'll Learn
Using EQing and panning
EQing and panning are crucial steps in achieving a clean and professional-sounding mix. Here are some detailed tips and techniques for using EQing and panning when working with white noise:
Panning Techniques
Panning is a powerful tool to create a sense of width and depth in your mix. When panning white noise, use the ""Pan" knob to control the stereo placement and create a sense of movement. Start by experimenting with different panning positions for the white noise. For example, you can pan the noise hard left or right to create a sense of extreme width. Or, you can automate the panning to move from left to right, creating a sweeping effect.
For a more complex panning technique, try panning the white noise one way and the reverb the other way. Then, have them cross over several times, gradually increasing the speed of the crossover as you approach the drop in your track. This technique adds interest and builds tension.
EQing Techniques
EQing is essential to sculpting the sound of white noise and ensuring it sits well in your mix. Start by adjusting the volume of the white noise to prevent it from overpowering other elements. Fine-tune the frequency spectrum using EQ to shape the noise to your liking.
Experiment with different types of EQ curves to shape the tone of the white noise. For example, a high-shelf EQ can boost or cut high frequencies, making the noise brighter or darker. A bell curve EQ can boost or cut specific frequencies, allowing you to target problem areas or enhance certain characteristics of the noise.
Additionally, consider using EQ to carve out space for other elements in your mix. For example, if you have a lead synth playing in the mid-range frequencies, you can use a notch filter on the white noise to reduce the frequencies competing with the synth, allowing the synth to cut through the mix more clearly.
Combining Panning and EQing
The combination of panning and EQing can create interesting effects. For example, you can pan the white noise hard left and apply a high-pass filter, then pan it hard right and apply a low-pass filter. This creates a sense of movement and frequency separation.
Another technique is to use EQ to create a sense of distance and depth. For example, you can cut some high frequencies and boost some low frequencies to make the noise sound farther away, then gradually boost the high frequencies and cut the low frequencies to bring the noise closer. Automating these EQ changes over time can create an intriguing sense of motion and evolution in your white noise.
Additional Tips
When working with white noise, don't be afraid to experiment. Try using different types of filters, such as bandpass, notch, or all-pass filters, to shape the sound. Distortion can also add interesting characteristics due to the inherent harmonics it introduces.
Amplitude modulation (AM) is another technique to explore. This involves using one noise source to modulate another, creating complex and evolving textures. Finally, remember that white noise is highly malleable, so feel free to layer it with other sounds, automate volume and filter changes, and apply creative effects to transform it into something unique and captivating.
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Layering a lowpass and a highpass
To create a good white noise effect, you can use a lowpass filter and a highpass filter in parallel. This allows you to control the resonance at each cutoff point independently. You can automate the filter to time it perfectly. Start with very low frequencies and sweep the cutoff point up to very high frequencies, allowing pure, unadulterated white noise through.
You can also use a highpass filter, starting with high frequencies and sweeping down to low frequencies. Alternatively, you can run the white noise through a sample and hold module if your synth has one. Control its sample rate with an LFO, starting very slow and increasing to very fast.
Another method is to use bandpassing with a moderately high Q. Layering a lowpass and a highpass filter allows independent control of resonance at each cutoff. This creates a notch filter. For risers, layer the synthesized noise with analog noise, such as vocal noises, car noises, or a fan turning on.
You can also experiment with saturation, distortion, compression, and EQ. Add a rising low pass filter, then a phaser or flanger, and adjust the LFO and frequency amounts.
Additionally, when using a DAW, you can make your state variable a high pass, automate the low pass, and adjust the high pass frequency to taste.
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Amplitude modulation
White noise is a random signal with equal intensity at different frequencies, resulting in a constant power spectral density. It is commonly used in music production to create special effects or enhance certain elements of a mix. By modulating the amplitude of white noise, you can control its volume and impact on the overall sound. This can be achieved by using a noise oscillator or a synth to adjust the volume envelope of the white noise.
One technique mentioned in the sources is the use of a low-pass filter with white noise. By applying a low-pass filter, the high-frequency energy of the white noise can be utilized instead of a sine wave to modulate parameters such as filter cutoff or pitch. This creates unique effects like an unusual wandering vibrato. Additionally, white noise can be mixed with the carrier signal to enhance sibilance, improve intelligibility, or create transients when vocoding percussive material.
When working with amplitude modulation and white noise, it is important to consider the biological validity of the output. In some applications, such as modelling the human cochlea, the use of band-passed white noise is essential. By adjusting the frequency of the white noise to match the specific wire being recorded from in the cochlear model, the output can be biologically accurate.
Furthermore, the choice between white noise and pink noise is also significant. Pink noise has equal energy per octave, while white noise has equal energy per frequency interval. This distinction can impact the resulting sound and the effectiveness of amplitude modulation. By band-passing either type of noise, the effect of running the generator at a higher frequency can be removed, allowing for more precise control over the output.
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Using a bandpass filter
In audio production, a bandpass filter can be used to create a "rising white noise" effect. By applying a bandpass filter to white noise, you can control the range of frequencies that are allowed to pass, giving you the ability to shape the sound and create movement in the noise. This is achieved by using a combination of a low-pass filter and a high-pass filter, which allows for independent control of the resonance at each cutoff point. By adjusting the cutoff frequencies and resonance, you can create a sweeping effect, making the white noise rise or fall in pitch.
Additionally, you can experiment with different types of bandpass filters, such as a passive variable bandpass filter, to further manipulate the sound. A passive variable bandpass filter provides a tunable frequency response, allowing you to create a range of sounds. This type of filter is commonly used in guitar "Wah" pedals to create a similar effect.
When working with bandpass filters, it's important to consider the order of the filter. For example, a first-order bandpass filter may not provide sufficient attenuation outside the passband, resulting in a less pronounced effect. Higher-order filters, such as second-order bandpass filters, can offer improved performance and more precise control over the frequency response.
It's worth noting that the specific steps for implementing a bandpass filter will depend on the audio software or hardware you are using. Different digital audio workstations (DAWs) and electronic circuits will have their own methods for applying filters and adjusting parameters.
By experimenting with bandpass filters and combining them with other effects, such as reverb, EQ, and volume modulation, you can create unique and interesting sounds with white noise.
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Adjusting the level
Lower the Volume
When using white noise in music production, it's important to start by lowering the volume. White noise can be overpowering, so reducing its volume prevents it from overwhelming other elements in the mix. In Serum, a popular synthesizer plugin, the default volume for the noise oscillator is 75%, which can be quite loud. Adjust the volume to your preference to ensure it complements the other sounds in your composition.
Pan the Noise
Panning allows you to control the stereo placement of the white noise. By using the 'Pan' knob in Serum or similar controls in other digital audio workstations (DAWs), you can position the white noise in the stereo field. Panning can create a sense of width and depth in your mix, enhancing the overall soundstage.
Automate Volume Changes
Automating volume changes can be particularly useful when creating dynamic effects or buildups in your music. For example, you can automate the volume of a riser to decrease as it gets closer to the drop, building tension and creating a more polished sound. This technique can add interest and excitement to your productions.
Use EQ and Filters
Equalization (EQ) and filters play a crucial role in shaping the sound of white noise. By adjusting specific frequencies, you can make the white noise brighter or darker, depending on your needs. Low-pass and high-pass filters, for example, can help you sculpt the sound by allowing or blocking certain frequency ranges.
Consider Your Environment
When using white noise to aid sleep or focus, consider your environment and adjust the volume accordingly. It's recommended to place the white noise machine or speaker in a corner of the room and set the volume to a level similar to that of a background conversation or light rustling. This way, the white noise blends seamlessly into your surroundings, providing a calming and unobtrusive auditory experience.
By following these guidelines, you can effectively adjust the level of white noise to suit your specific needs, whether it's for music production, improving sleep, or enhancing focus and productivity.
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Frequently asked questions
White noise is a noise that contains all frequencies across the audible spectrum in equal measure. It is often likened to the static sound of an untuned radio or television.
Panning white noise can be done using a digital audio workstation (DAW) such as Serum, which offers a dedicated noise oscillator with control over the noise colour, volume, and other parameters. The 'Pan' knob in Serum can be used to control the stereo placement of the noise.
There are several techniques to improve the sound of white noise:
- Experiment with filters, effects, layering, pitch, automation, etc.
- Use other noise colours such as pink noise or brown noise.
- Try different types of filters such as bandpass, notch, or all-pass (phaser).
- Apply amplitude modulation (AM) or frequency domain transforms.
- Add distortion to create more ordered noise due to inherent harmonics.
White noise is commonly used to block out background noises and create a noise-free environment, which can be helpful for improving sleep, focus, and reducing stress and anxiety.
