Acoustics and Recording Techniques Flashcards
7 cards from real CMP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Acoustics and Recording Techniques flashcards as text
What is 'phase cancellation' and when does it typically become a problem in recording?
Answer: The reduction in amplitude when two signals with opposite polarity are summed
Phase cancellation occurs when two signals are out of phase and summed together, causing their waveforms to partially or fully cancel, thinning the sound.
What is the primary advantage of recording at 32-bit float compared to 24-bit integer?
Answer: No clipping — any signal level can be captured and adjusted later without permanent distortion
32-bit float uses a floating-point format with enormous headroom, so even signals that exceed 0 dBFS are captured without irreversible clipping distortion.
An engineer is recording a loud electric guitar cabinet and is concerned about SPL damaging a condenser microphone. What is the most common solution?
Answer: Engage the microphone's pad switch to reduce its sensitivity
Most large-diaphragm condensers have a pad switch (typically -10 or -20 dB) that reduces the internal sensitivity, allowing capture of high-SPL sources without distortion.
What is 'LUFS' and why has it become a standard measurement for music producers delivering content to streaming platforms?
Answer: Loudness Units relative to Full Scale — a perceptual loudness measurement used by streaming normalization algorithms
LUFS (Loudness Units relative to Full Scale) measures integrated perceptual loudness; platforms like Spotify and Apple Music normalize to targets like -14 LUFS integrated.
Which technique involves recording a room's impulse response and convolving it with a dry signal to apply that room's acoustic character?
Answer: Convolution reverb
Convolution reverb mathematically convolves a dry signal with an impulse response (the room's sonic fingerprint), accurately recreating the acoustics of any captured space.
When tracking a full band live in a studio, what is the primary purpose of recording 'scratch vocals'?
Answer: To provide a reference guide for the musicians without committing to a keeper take
Scratch vocals give the band a live vocal reference to play along to during tracking, with the expectation they will be replaced by proper overdub takes later.
What does the term 'gain staging' mean in the context of a recording signal chain?
Answer: Managing signal levels at each stage of the chain to maintain an optimal signal-to-noise ratio without clipping
Gain staging ensures that each device in the signal path operates in its optimal range — hot enough to minimize noise but not so hot as to introduce clipping or distortion.