CEA Sound Design & Production 2 — Questions and Answers
Question 1: Which synthesis technique creates new timbres by modulating the frequency of one oscillator (carrier) with another (modulator)?
- Subtractive synthesis
- FM (Frequency Modulation) synthesis (Correct answer)
- Additive synthesis
- Granular synthesis
Correct answer: FM (Frequency Modulation) synthesis
FM synthesis, popularized by Yamaha's DX7, creates complex harmonic spectra by modulating the frequency of a carrier oscillator with a modulator oscillator. The modulation index and ratio between the two determine the resulting timbre.
Question 2: In sound design, what is a 'Foley' artist responsible for?
- Recording musical scores for film
- Creating and recording everyday sound effects synchronized to picture in a studio (Correct answer)
- Editing dialogue tracks
- Designing speaker systems for theaters
Correct answer: Creating and recording everyday sound effects synchronized to picture in a studio
A Foley artist recreates and records everyday sounds — footsteps, clothing movement, prop handling — in a specialized studio synchronized to picture. These replace or augment production sound to enhance realism.
Question 3: What is 'granular synthesis' based on?
- Filtering sawtooth waveforms through resonant filters
- Chopping audio into tiny grains and rearranging or layering them (Correct answer)
- Using physical modeling equations to recreate instrument behavior
- Combining harmonic partials at specific amplitudes
Correct answer: Chopping audio into tiny grains and rearranging or layering them
Granular synthesis breaks audio into tiny grains (typically 1–100 ms) and manipulates parameters like grain size, density, pitch, and position. It can create evolving textures, time-stretching, and otherworldly timbres.
Question 4: Which parameter in a synthesizer ADSR envelope determines how quickly the sound fades after the key is released?
- Attack
- Decay
- Sustain
- Release (Correct answer)
Correct answer: Release
The Release stage of the ADSR envelope controls how long the sound takes to fade to silence after a note is released. Short release values create percussive sounds; long release values create pads with trailing tails.
Question 5: What does 'layering' achieve in sound design for impact effects?
- Reduces frequency content by eliminating redundant signals
- Combines multiple sounds across frequency ranges to create a fuller, more complex sound (Correct answer)
- Applies a single reverb to all sound elements simultaneously
- Converts mono effects into stereo using delay-based widening
Correct answer: Combines multiple sounds across frequency ranges to create a fuller, more complex sound
Layering combines multiple sound sources — each occupying different frequency ranges — to build a composite effect with greater complexity and impact. Common in explosion and hit design, where sub elements, mid thud, and high transient are stacked.
Question 6: In production sound design, what is 'worldizing'?
- Applying digital reverb to place a sound in a virtual space
- Playing back a sound through a speaker in a real physical space and re-recording it (Correct answer)
- Exporting stems for surround sound delivery
- Converting stereo audio to binaural format
Correct answer: Playing back a sound through a speaker in a real physical space and re-recording it
Worldizing, coined by Walter Murch, involves playing a sound through a speaker in a physical space and re-recording the result. This imprints real acoustic characteristics onto studio-recorded material, making it sound as though it exists in that environment.
CEA Sound Design & Production 2
Which synthesis technique creates new timbres by modulating the frequency of one oscillator (carrier) with another (modulator)?