Adobe Audition Compressor Tutorial: Implement Dynamics Processing

There are actually two ways you can set your compressor using dynamics processing effects. The first one is using “Graphic” and the second one is using “Traditional”. You can see them as tabs in the Dynamics processing effects. Graphic methods are much simpler to do. Traditional methods are for advanced users that needs very fine compression adjustments. But what you set in the graphic methods will also be automatically reflected in the traditional settings tab. Since you need to even out the volume, the ideal compressor behavior is as follows:

a.) When the audio hits its minimum RMS power, the compressor should boost its level to make it loud.
b.) When the audio hits the same level with maximum RMS power, it level will be retained (no gain or no reduction).
c.) When the audio hits above its maximum RMS power, it will be attenuated.

6.) The best compressor presets to start with to accomplish the above behavior is the “classic softknee”. Select the entire wave (Go to Edit then select entire wave). Then go again to Effects – Amplitude – Dynamics processing. Under “Presets” select “Classic SoftKnee”. Let’s use the graphical method to implement the settings.

You can simple click and drag the points in the graph to adjust the default compression behavior. Supposing you would like a -65dB input power to become a -40dB at the compressor output (making it louder when it’s soft). You can click and drag such that it will look like below:

Adjusted classic softknee

Adjusted classic softknee

The x-axis is the compressor input while the y-axis is the compressor output. Looking at the graph above; when the input is -65dB, the output is -40dB. You can also notice that even when the input to the compressor is above -10dB, say -5dB or even 0dB (loudest). The output will still remain at -10dB. This is because the overall objective of the compressor (used in this example) is to even out the volume.

7.) Now click at “Band Limiting”. The low cutoff is set to 0Hz and the High cutoff to 24000Hz. This implies that the compression adjustments will implement in this frequency range. If you like to compress bass frequencies, you need to change the high cutoff from 24000Hz to only 150Hz or 200Hz.

8.) To implement the dynamic settings, click OK. This is how the resulting audio waveform should look like after compression:

resulting wave after compression

resulting wave after compression

As you can see the volume peaks throughout the waveform is now even. You cannot only use the compressor to even out the volume but you can use them for any dynamics processing task you want.

Content last updated on June 21, 2012

  • Emerson Maningo

    Hi Hebz,
    You can send it via email as long as it is in mp3 format (320Kbps) format and less than 10MB in file size. You can refer to the contact page of my blog for the email address. By submitting, you agree to the site terms and conditions and you hold the rights to the song and the recording. Cheers.

    Emerson

  • Hebz

    I have my own song. How can i upload them for you to comment about how they sound?