Multiband Compressor

This is a very advanced tool with great potential but it’s much easier to screw things up than to improve the sound if we don’t know how to use it. Let’s start by understanding what a compressor is.


Compression reduces the dynamic range of a sound. It turns down the loudest parts of the sound while bringing the quietest parts up. This makes the volume more consistent but decreases the dynamic range. 

visual comparison of uncompressed audio and compressed audio. Compressed audio has shorter peaks and looks more round

The parameters are:

  • Threshold is the point that the compressor kicks in
  • Ratio determines how much the volume is reduced by
  • Attack Time is how quickly the compressor engages and reduces the volume of the audio
  • Release Time is how long it takes the compressor to dis-engage
  • Post Gain is necessary to compensate we use the ‘make-up gain’ or ‘output gain’ control to increase the volume of the audio coming out of the compressor

Threshold and Ratio

A graph showing how a compressor works

Attack and Release time

A graph to show how attack and release time work

Multiband Compressor advantage

Multiband compressors can act differently on different frequency bands. The advantage of multiband compression over full-bandwidth compression is that problems related to a specific frequency range can be fixed without unnecessary compression in the other, unrelated frequencies. The downside is that frequency-specific compression is more complex and requires more processing capacity than full-bandwidth compression and can introduce phase issues.

Xeq Multiband Compressor

We have chosen a professional vintage style, inspired by the best analog compressors, with a very smooth sound.
We have 3 bands, just like the best-known traditional compressors.
The first band goes from 0Hz -> Low Xover
The second band goes from Low Xover -> Hight Xover
The third band goes from Hight Xover -> 20Khz

Low Xover = Hight Xover -> Two bands only

How to test and learn

The songs are all fully compressed and the master, so the Multiband Compressor could be not necessary. Anyway, I suggest the following unmastered album in order to fully enjoy xeq.