Audiobook Production Audiobook Production MCQ 4 — Questions and Answers
Question 1: What is the typical RMS (integrated loudness) target range ACX specifies for audiobook files?
- -6 to -3 dBFS RMS
- -18 to -12 dBFS RMS (Correct answer)
- -23 to -18 dBFS RMS
- -30 to -26 dBFS RMS
Correct answer: -18 to -12 dBFS RMS
ACX requires finished audio to fall between -23 dBFS and -18 dBFS RMS, with a peak no higher than -3 dBFS.
Question 2: When recording an audiobook with a condenser microphone, what phantom power voltage is typically required?
- 9V
- 12V
- 24V
- 48V (Correct answer)
Correct answer: 48V
Most large-diaphragm condenser microphones require +48V phantom power supplied by the audio interface or mixer.
Question 3: What is a 'breath edit' in audiobook post-production?
- Adding artificial breath sounds for dramatic effect
- Removing or reducing loud, distracting inhale sounds between sentences (Correct answer)
- Applying a high-pass filter to reduce low-frequency breathing noise
- Inserting a pause after each paragraph for pacing
Correct answer: Removing or reducing loud, distracting inhale sounds between sentences
Breath editing involves attenuating or deleting audible inhales that would distract the listener, while preserving natural-sounding pacing.
Question 4: In audiobook production, what does 'stereo vs. mono' refer to when choosing a delivery format?
- Whether the narrator uses one or two microphones simultaneously
- Whether the final audio file has one channel or two channels of identical content (Correct answer)
- Whether the studio uses hardware or software processing
- Whether background music is panned left or right
Correct answer: Whether the final audio file has one channel or two channels of identical content
Most audiobook distributors require mono files because spoken word narration offers no benefit from stereo imaging and mono halves file size.
Question 5: What is the role of a 'high-pass filter' (HPF) in audiobook recording?
- It boosts high-frequency air and presence in the voice
- It cuts low-frequency rumble and handling noise below a set frequency (Correct answer)
- It limits the peak level to prevent clipping
- It widens the stereo image of the recorded voice
Correct answer: It cuts low-frequency rumble and handling noise below a set frequency
A high-pass filter removes low-frequency content such as AC hum, floor vibration, and mic handling noise that muddies the vocal track.
Question 6: Which of the following best describes 'consecutive audio' as required by ACX?
- All chapters must be recorded on the same day
- The retail audio sample, opening credits, and chapters must flow as one uninterrupted listening experience (Correct answer)
- Each chapter file must start exactly where the previous one ended in waveform continuity
- The narrator must record without stopping or punching in
Correct answer: The retail audio sample, opening credits, and chapters must flow as one uninterrupted listening experience
ACX requires that all components — retail sample, opening credits, chapters, closing credits — together form a seamless, consecutive audio experience.
Question 7: What is 'proximity effect' in microphone use?
- Distortion caused by placing the mic too far from the sound source
- The boost in bass frequencies that occurs when a directional mic is placed very close to the source (Correct answer)
- The tendency of an omnidirectional mic to pick up all room sounds equally
- Phase shift introduced by two mics recording the same source
Correct answer: The boost in bass frequencies that occurs when a directional mic is placed very close to the source
Proximity effect is a physical property of directional microphones that increases low-frequency response as the distance to the source decreases.
Audiobook Production Audiobook Production MCQ 4
What is the typical RMS (integrated loudness) target range ACX specifies for audiobook files?