CMP Acoustics and Recording Techniques 3

Question 1

Which recording technique uses two microphones placed at 90° to each other with their capsules coincident, producing a stereo image with good mono compatibility?

Accepted Answer

X/Y (coincident pair)

Answer

X/Y coincident stereo uses two cardioid mics with capsules overlapping at 90°, delivering a stable stereo image that collapses to mono without phase issues.

Question 2

What is 'room mode' in the context of studio acoustics?

Accepted Answer

A resonant frequency determined by the room's dimensions

Answer

Room modes are standing waves at frequencies whose half-wavelengths fit between parallel surfaces, causing uneven bass response at different positions.

Question 3

A producer wants to record a drum kit with the most accurate stereo representation of the kit as heard by the drummer. Which overhead technique is most appropriate?

Accepted Answer

Recorderman technique (spaced pair from snare perspective)

Answer

The Recorderman technique places two mics equidistant from the snare — one overhead and one over the shoulder — replicating the drummer's listening perspective.

Question 4

What is the purpose of using a high-pass filter (HPF) when recording a trumpet?

Accepted Answer

Remove unwanted low-frequency rumble and stand vibration

Answer

A HPF below the trumpet's fundamental range eliminates mechanical rumble, HVAC noise, and stand vibrations that muddy the recording.

Question 5

In acoustic treatment, what type of material is most effective at absorbing low-frequency (bass) energy?

Accepted Answer

Fiberglass or rockwool bass traps in corners

Answer

Thick, dense mineral wool or fiberglass bass traps placed in room corners (where bass modes concentrate) are the most effective low-frequency absorbers.

(CMP) Certified Music Producer Practice Test

(CMP) Certified Music Producer Practice Test

CMP Acoustics and Recording Techniques 3