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Maximizing Sound Quality: The Art of Multiband Compression in Audio Mastering

Introduction to Audio Mastering

Audio mastering is a crucial process in music production that can make or break a song’s commercial viability. The finished product must have a professional polish that is essential for radio play, streaming, and online distribution.

The importance of audio mastering lies in its ability to enhance the mix, balance the frequency, reduce noise, add space, and ensure consistency. The mastering process is the final step in the music production process and the first step in the distribution process, making it an important part of the music-making process.

A professional audio mastering engineer is an essential tool for achieving a professional sound. The engineer’s expertise and the use of specialized equipment is needed to create a final product that can be heard and appreciated by a broad audience.

Audio mastering engineers work with the original mix provided by the recording engineer, making adjustments to ensure that the sound is optimized for distribution to the public.

Enhancing and Mastering to Commercial Level

The primary goal of audio mastering is to create a finished product that is ready for commercial distribution. Once the mix has been handed over to the mastering engineer, they work to enhance the sound, ensuring that it meets professional standards.

Equalization is an important step in optimizing the sound quality of a song. This step balances the frequency response, ensuring that it is neither too high nor too low.

Through equalization, the engineer can make sure that the sound has depth and clarity, resulting in a full-bodied sound that stands out.

Multiband Compression for Enhancement

Multiband compression is a type of processing that is often used during audio mastering to enhance a song’s quality. It works by dividing the frequency spectrum of a mix into different bands.

Each band is then compressed independently to ensure that the mix has a consistent balance between the different frequencies. Multiband compression provides control over the sound’s low-end, mid-range, and high-end frequencies, allowing the engineer to fine-tune the resulting sound.

Audio Compression

Compression is an important process in audio mastering that involves controlling the dynamics of a sound. The process ensures that the loud and quiet parts of a sound are balanced, resulting in a fuller, more polished sound.

A compressor is used to regulate the volume of a sound, ensuring it doesn’t peak while retaining its dynamics. The controls of a compressor include the threshold, ratio, attack, release, and make-up gain.

The threshold sets the audio level at which the compressor begins to work, and the ratio determines the degree of compression applied. The attack and release controls adjust the speed at which the compressor responds to changes in volume.


In summary, audio mastering is a critical part of the music production process. A professional audio mastering engineer can enhance the overall sound, ensuring that it meets commercial quality standards.

Multiband compression and audio compression are essential tools that engineers use to create a finished product with optimal sound quality and balance. By understanding these principles of audio mastering, producers and engineers can work together to create music that is not only sonically pleasing but also commercially viable.

Multiband Compression

There are two types of audio compressors – single-band and multiband compressors. A single-band compressor applies the same amount of gain reduction to the entire frequency range of a mix.

In contrast, a multiband compressor divides the mix into several frequency bands, each with its own independent compressor. With a multiband compressor, you can apply more precise gain reduction settings to specific frequency ranges and achieve more nuanced control over the overall sound.

Division of Mix into Four Frequency Bands

Most multiband compressors divide the mix into four frequency bands: low-frequency sounds, lower mid-frequency sounds, upper mid-frequency sounds, and higher frequency sounds. Each band is then compressed differently, allowing the engineer to target different aspects of the audio mix.

The separation of the mix into bands enables more precise control over the sound, ensuring that each frequency range is processed differently and more accurately.

Setting up a Multiband Compressor

Setting up a multiband compressor requires careful consideration of the mix’s dynamics and the individual frequency ranges. The first step is to identify the frequency ranges that need to be addressed.

Generally speaking, the low-end is the most critical frequency range to compress, followed by the higher frequency ranges. Next, carefully adjust the threshold, ratio, and attack and release times for each of the four bands.

Attentive adjustments and appropriate use of threshold, ratio, and attack and release times will create a balanced sound that meets the required commercial standards.

Tips for Better Audio Mastering

Effective use of multiband compression is an essential part of audio mastering. However, there are several tips that engineers should keep in mind to achieve exceptional results:

Avoiding Distortion

Multiband compression has the potential to introduce distortion if used excessively. To avoid distortion, it is critical to maintain a balance between the degree of compression applied and the level of the input signal.

Flattening and Letting Transients Through

The purpose of multiband compression is to create a well-balanced and polished sound while retaining the original dynamics. However, over-compression can lead to a flat and lifeless sound.

To avoid this, allow transients, which are small bursts of sound that occur between the quieter passages of the audio track, to pass through, while flattening out the sound.

Importance of Attack and Release Times

Attack and release times are critical in setting up multiband compression. They determine how quickly the compressor starts and stops working.

The attack time determines how quickly the compressor responds to a sound while the release time determines how quickly the compressor stops lowering the gain level. The use of appropriate attack and release settings will help achieve a polished sound without squashing the audio.

Using Multiband Compressor for Low-end Instead of Equalizer

Typically, equalizers are used to address frequency imbalances, but multiband compressors can also be used for this purpose. In fact, using a multiband compressor to address low-end frequency imbalances can produce more natural sounding results than using an equalizer.


Multiband compression is an essential tool in audio mastering, allowing engineers to fine-tune sounds and produce a polished, professional sound. Proper setup of a multiband compressor requires a balance of threshold, ratio, attack and release times, allowing the audio engineer to achieve a nuanced control of the mix’s dynamics.

Follow the tips for avoiding distortion and flattening out sounds while letting transients through, use appropriate attack and release settings, and consider using multiband compression for low-end frequency imbalances to achieve optimal results. In conclusion, multiband compression is an essential tool for achieving a polished and professional sound in audio mastering.

By dividing the mix into four frequency bands and carefully setting the threshold, ratio, and attack and release times for each band, engineers can achieve a nuanced control of the sound’s dynamics while minimizing distortion and retaining the original sound’s dynamics. To avoid flattening out the sound, it is important to let transients through while flattening the audio.

Finally, consider using multiband compression for low-end frequency imbalances instead of an equalizer. Proper use of multiband compression is a key component of audio mastering, and utilizing these tips can lead to exceptional results.

Ultimately, with careful consideration and the proper use of multiband compression, producers and engineers alike can create music that is both sonically pleasing and commercially viable.

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