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Equipping Your Home Recording Studio - A free download from Audio Masterclass

An Introduction to Compression: Basic Compression - A free download from Audio Masterclass

An Introduction to Equalization - A free download from Audio Masterclass

This one simple mistake will lose you a third of your songwriting royalties - with video

Click removal at the start of a track

Demonstrating the Waves J37 analog tape emulation plug-in and comparison with a real tape recorder

How complicated do your monitors have to be?

The professional way to make sure your mics are connected correctly

Q: Why do I have to record acoustic guitar twice?

Clipping and compressing a drum recording to achieve an exciting sound texture

Visualizing stereo information using Lissajous figures

7 important microphone types that you should know and the benefits of each

Your mix sounds good in your car. But does it sound good in ANY car?


A description of the technology and function of filters as found in mixing consoles.


A filter is the simplest form of EQ section possessing only the parameters of cut-off frequency and slope.

The cut-off frequency is the frequency at which the response has already dropped by -3 dB.

The slope is the rate at which the level drops above the cut-off frequency, measured in dB/octave. It is easy to design filters with slopes of 6, 12, 18 and 24 dB/octave.

  • A low-pass filter allows low frequencies through and reduces the level of high frequencies.
  • A high-pass reduces the level of low frequencies.
  • A band-pass filter reduces the level of low and high frequencies.
  • A notch filter filters out a narrow band of frequencies.
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By David Mellor Thursday May 22, 2003
Online courses from Audio Masterclass