DJ Audio Effects and Signal Processing 3

Question 1

What is the fundamental difference between a phaser and a flanger audio effect?

Accepted Answer

A phaser uses all-pass filters to shift phase, while a flanger uses a modulated short delay line

Answer

A phaser shifts the phase of the signal at certain frequencies using all-pass filters, while a flanger mixes a modulated delay copy creating comb filtering — similar sounds but different mechanisms.

Question 2

What does the 'bit crusher' audio effect do to a sound?

Accepted Answer

Reduces bit depth and/or sample rate to create a lo-fi, distorted digital sound

Answer

A bit crusher lowers the resolution of the audio by reducing bit depth and sample rate, introducing quantization noise and aliasing for a retro, lo-fi effect.

Question 3

Which DJ technique involves using an EQ to simultaneously cut bass on the outgoing track while gradually restoring bass on the incoming track?

Accepted Answer

EQ swap (bass swap)

Answer

An EQ swap (bass swap) ensures only one track's bass is heard at a time during a transition, preventing muddiness and phase cancellation from two competing basslines.

Question 4

What is 'overdrive' when applied as an audio effect in DJ performance?

Accepted Answer

A form of soft, warm distortion that adds harmonic saturation to the audio signal

Answer

Overdrive is a saturation effect that gently clips the waveform, adding harmonic overtones that create warmth and perceived loudness — commonly used to add grit to electronic tracks.

Question 5

What does a chorus effect do to an audio signal?

Accepted Answer

Creates multiple slightly detuned and delayed copies of the signal and blends them to produce a richer, fuller sound

Answer

A chorus effect layers slightly detuned and time-offset copies of the original signal, mimicking the natural variations heard when multiple musicians play the same part.

DJ - Mixing Practice Test

DJ - Mixing Practice Test

DJ Audio Effects and Signal Processing 3