DJ Audio Effects and Signal Processing 1 — Questions and Answers
Question 1: What does EQ stand for in DJ mixing?
- Electronic Quality
- Equalizer (Correct answer)
- Echo Queue
- Equal Quantity
Correct answer: Equalizer
EQ stands for Equalizer, a tool used to boost or cut specific frequency ranges in the audio signal.
Question 2: Which frequency range does the bass EQ knob typically control on a DJ mixer?
- 20 Hz – 200 Hz (Correct answer)
- 200 Hz – 2 kHz
- 2 kHz – 8 kHz
- 8 kHz – 20 kHz
Correct answer: 20 Hz – 200 Hz
Bass frequencies generally fall between 20 Hz and 200 Hz, covering kick drums, sub-bass, and low-end rumble.
Question 3: What does a high-pass filter (HPF) do to an audio signal?
- Boosts all high frequencies
- Allows only high frequencies to pass through while cutting lows (Correct answer)
- Cuts all frequencies above a set point
- Adds high-frequency reverb
Correct answer: Allows only high frequencies to pass through while cutting lows
A high-pass filter lets frequencies above the cutoff point pass through and attenuates everything below it, removing bass and sub-bass.
Question 4: What does a reverb effect simulate in DJ mixing?
- A short, rhythmic digital repeat
- The acoustic reflections of sound bouncing within a physical space (Correct answer)
- A pitch modulation effect
- Stereo widening of the audio field
Correct answer: The acoustic reflections of sound bouncing within a physical space
Reverb simulates the natural reflections and decay of sound within a physical environment such as a room, hall, or cave.
Question 5: What unit is used to measure the loudness or gain of an audio signal?
- Hertz (Hz)
- Decibels (dB) (Correct answer)
- Watts (W)
- Ohms (Ω)
Correct answer: Decibels (dB)
Decibels (dB) are the standard unit for measuring audio signal level, gain, and volume changes in audio engineering.
Question 6: What is a low-pass filter (LPF) commonly used for in DJ transitions?
- Boosting treble to add brightness
- Cutting high frequencies to create a muffled, filtered effect during a mix (Correct answer)
- Increasing the BPM of a track
- Synchronizing two tracks together
Correct answer: Cutting high frequencies to create a muffled, filtered effect during a mix
DJs use low-pass filters to roll off the highs and mids, creating a smooth, filtered transition or building tension before a drop.
Question 7: Which audio effect adds a distinct, rhythmic echo that repeats after a set time interval?
- Reverb
- Flanger
- Delay (Correct answer)
- Chorus
Correct answer: Delay
A delay effect stores the audio signal and plays it back after a set amount of time, creating distinct, repeating echoes.
DJ Audio Effects and Signal Processing 1
What does EQ stand for in DJ mixing?