CMP Mixing and Mastering 2 — Questions and Answers
Question 1: What is the primary purpose of a high-pass filter (HPF) on most non-bass instrument tracks?
- Remove unwanted low-frequency rumble and mud (Correct answer)
- Boost the high-end presence
- Add harmonic distortion
- Control dynamic range
Correct answer: Remove unwanted low-frequency rumble and mud
HPFs eliminate sub-bass energy on non-bass instruments that clutter the low end without contributing musically.
Question 2: In the context of mix translation, what does it mean when a mix 'translates well'?
- The mix was exported in multiple file formats
- The mix sounds balanced across various playback systems (Correct answer)
- The lyrics are clearly audible
- The mix has been converted to mono successfully
Correct answer: The mix sounds balanced across various playback systems
Good translation means the mix sounds consistently balanced on headphones, car stereos, club systems, and consumer speakers.
Question 3: What is 'inter-sample peaking' and why is it important in mastering?
- Peaks that occur between sample points during D/A conversion that can cause clipping (Correct answer)
- The distance between two audio samples in a file
- Distortion caused by sample rate conversion
- Peaks visible in the stereo field meter
Correct answer: Peaks that occur between sample points during D/A conversion that can cause clipping
Inter-sample peaks exceed 0 dBFS during reconstruction, causing distortion on decoders even when the waveform shows no clipping.
Question 4: Which metering standard is most commonly used for streaming platform loudness normalization?
- VU metering
- Peak metering
- LUFS (Loudness Units Full Scale) (Correct answer)
- RMS metering
Correct answer: LUFS (Loudness Units Full Scale)
LUFS is the integrated loudness measurement standard used by Spotify, Apple Music, YouTube, and other platforms for normalization.
Question 5: What is the function of M/S (Mid-Side) processing in mastering?
- It converts audio from mono to stereo
- It allows independent EQ and compression of the center and side signals (Correct answer)
- It removes DC offset from the master bus
- It applies dithering to the final output
Correct answer: It allows independent EQ and compression of the center and side signals
M/S processing decodes stereo into mid (center) and side (difference) components, enabling targeted treatment of each element.
Question 6: What is 'gain staging' in the context of a mixing session?
- Setting the final export volume
- Managing signal levels at each stage of the signal chain to optimize headroom and avoid distortion (Correct answer)
- Using automation to increase volume over time
- Applying a limiter to the master bus
Correct answer: Managing signal levels at each stage of the signal chain to optimize headroom and avoid distortion
Proper gain staging ensures each plugin and channel operates in its optimal range, minimizing noise and distortion throughout the chain.
Question 7: A mix engineer notices harsh sibilance on a lead vocal. Which tool is the most targeted solution?
- Multiband compressor
- De-esser (Correct answer)
- Noise gate
- Chorus effect
Correct answer: De-esser
A de-esser is a frequency-selective compressor specifically designed to tame harsh 'S' and 'T' sounds in vocal recordings.
CMP Mixing and Mastering 2
What is the primary purpose of a high-pass filter (HPF) on most non-bass instrument tracks?