Sound Design Audio Effects and Signal Processing 2

Question 1

What is a 'limiter' in audio signal processing?

Accepted Answer

A compressor with an extremely high ratio (typically 10:1 or more) that prevents the signal from exceeding the threshold

Answer

A limiter is essentially a compressor with a very high ratio (often infinity:1) that acts as a ceiling, ensuring the output signal never exceeds the threshold level — used for broadcast loudness compliance and mastering.

Question 2

What does a 'noise gate' do?

Accepted Answer

Attenuates or mutes a signal when it falls below a set threshold level

Answer

A noise gate silences or attenuates a signal when its level falls below a defined threshold, effectively removing low-level noise (hum, hiss, bleed) during pauses while allowing intentional signal through when it's loud enough.

Question 3

What is 'saturation' as an audio effect?

Accepted Answer

Introducing harmonic distortion that emulates the warm clipping characteristics of analog tape or tube electronics

Answer

Saturation adds harmonic distortion by emulating the soft-clipping behavior of analog tape, tube amplifiers, or transistors, adding warmth, presence, and character without the harshness of digital clipping.

Question 4

What is the 'mix' or 'wet/dry' knob on an effects processor?

Accepted Answer

Blends between the unprocessed (dry) original signal and the fully processed (wet) signal

Answer

The wet/dry (mix) control sets the balance between the unprocessed dry signal and the effect-processed wet signal, allowing precise blending — 100% wet means only processed signal, 0% means only original.

Question 5

What does a 'phaser' effect do to audio?

Accepted Answer

Applies all-pass filters to create peaks and notches that sweep across the frequency spectrum, creating a swirling sound

Answer

A phaser uses all-pass filters to create peaks and notches in the frequency response that sweep up and down the spectrum based on an LFO, creating a distinctive whooshing or swirling modulation effect.

Sound Design Practice Test

Sound Design Practice Test

Sound Design Audio Effects and Signal Processing 2