CMP Mixing and Mastering Principles Questions and Answers

Question 1

A mastering engineer is working on a dense electronic track and notices the kick drum is causing the main bus compressor to 'pump' excessively, ducking the high-frequency synths and hi-hats with every hit. Which of the following is the MOST effective technique to address this issue while maintaining overall dynamic control?

Accepted Answer

Use a multiband compressor to apply compression only to the low frequencies.

Answer

A multiband compressor allows the engineer to split the audio into different frequency bands and apply compression independently to each. By compressing only the low-frequency band where the kick drum resides, the compressor can control the kick's dynamics without affecting the mid and high frequencies, thus preventing the 'pumping' effect on the synths and hi-hats.

Question 2

What is the primary purpose of using Mid-Side EQ during the mastering stage?

Accepted Answer

To apply equalization to the mono (center) and stereo (side) information of a mix independently.

Answer

Mid-Side (M/S) EQ separates a stereo audio signal into two components: the 'Mid' (mono sum, or what's common to both left and right channels) and the 'Side' (stereo difference, or what's unique to the left and right channels). This allows a mastering engineer to make precise EQ adjustments to elements in the center of the mix (like lead vocals, kick, and bass) without affecting the wide-panned elements, and vice-versa, providing powerful control over the stereo image and clarity.

Question 3

When mixing, a primary goal is to create a sense of depth and space. Which of the following is a common and effective technique for achieving this?

Accepted Answer

Using a high-pass filter on reverb returns to remove low-frequency mud and create clarity.

Answer

Low-frequency buildup in reverb can make a mix sound muddy and cluttered, obscuring the clarity of key elements like the kick and bass. By using a high-pass filter on the reverb return (auxiliary) channel, a producer can remove these unnecessary low frequencies, allowing the reverb to add space and depth without compromising the mix's low-end definition.

Question 4

A producer is preparing a final master for submission to major streaming services like Spotify and Apple Music. What is the primary reason for mastering to a specific integrated LUFS target (e.g., -14 LUFS)?

Accepted Answer

To prevent the streaming service's loudness normalization algorithm from turning the track down and potentially altering its dynamics.

Answer

Streaming services use loudness normalization to provide a consistent listening experience. If a track is submitted with a much higher integrated LUFS level than the platform's target (e.g., -14 LUFS for Spotify), the platform will simply turn it down. Mastering to the platform's target ensures the track is played back at a level close to what the producer intended, preserving the intended dynamic range and impact without the service applying its own gain reduction.

Question 5

In a typical mastering signal chain, what is the logical order for the three most fundamental processors?

Accepted Answer

EQ -> Compressor -> Limiter

Answer

The standard and most logical mastering chain order is EQ, then Compressor, then Limiter. First, a corrective EQ is used to balance the frequency spectrum and fix any tonal issues. Next, a compressor is used to 'glue' the mix together and control the overall dynamics. Finally, a brickwall limiter is placed at the end of the chain to increase the overall loudness to a competitive level and set the final output ceiling, preventing clipping.

(CMP) Certified Music Producer Practice Test

(CMP) Certified Music Producer Practice Test

CMP Mixing and Mastering Principles Questions and Answers