Comp.03: Equalisation

Q: What is equalisation (EQ)?

A: Equalisation is a form of dynamic processing that balances the amplitude of different frequencies within a signal to adjust the treble, mid, and bass.

Q: How does EQ affect frequencies?

A: EQ can increase (boost) or decrease (cut) the amplitude of specific frequency ranges.

Q: What is a filter in the context of EQ?

A: A filter is a tool that allows you to cut or boost a specific frequency range, letting some parts of the signal pass through unaffected.

Q: How are filters used in DAWs?

A: Filters are often plugins in DAWs, which can be automated for dynamic changes during a track.

Cutoff Frequency

Determines the point where frequencies start to be removed.

Centre Frequency

Determines the frequency a band-pass filter allows through.

Gain

Specifies the amount of cut or boost applied to frequencies.

Resonance

Adds a narrow boost to frequencies around the cutoff point.

Slope

Controls how sharply the filter acts at the cutoff frequency.

Q: What does a low-pass filter (LPF) do?

A: An LPF reduces the level of all frequencies above the cutoff frequency, letting lower frequencies pass unaffected. It is useful for reducing hiss.

Q: What does a high-pass filter (HPF) do?

A: An HPF allows frequencies above the cutoff frequency to pass unaffected while cutting lower frequencies. It is often used to reduce low-frequency rumbles and plosives.

Q: What is a band-pass filter?

A: A band-pass filter combines LPF and HPF, cutting off signals at both the lowest and highest parts of the signal, leaving the middle frequencies unaffected.