Why does transposing a sample several octaves up cause artifacts, even in high-quality samplers?
AThe sample rate decreases at higher pitches, reducing fidelity
BSpeeding up playback to raise pitch compresses attack transients and alters the perceived timbre of the original sound's overtone structure
CSamplers cannot play frequencies above 10 kHz
DHigher pitches exceed the bit depth of the sample
Transposing a sample up speeds up playback, which compresses the attack envelope and shifts all harmonics (including formants) proportionally upward. The sound becomes thinner and different in character. Multi-sampling (recording at multiple pitches) solves this.
Question 2 True / False
True or false: An analog drum machine like the Roland TR-808 uses recorded drum samples as its sound source.
TTrue
FFalse
Answer: False
The TR-808 synthesizes its sounds from analog circuits — the bass drum is a swept sine wave oscillator with a specific decay envelope, not a recording. This is why it sounds distinctly different from acoustic drum samples.
Question 3 Short Answer
What is a loop point in sampling, and what makes a 'clean' loop?
Think about your answer, then reveal below.
Model answer: A loop point is a splice location in a sample that allows the audio to repeat seamlessly during sustained playback. A clean loop has matching amplitude and phase at both the start and end of the loop region, preventing audible clicks or discontinuities.
Poor loop points produce clicks (phase discontinuity), pitch glitches, or amplitude steps. Crossfade loops blend the end into the beginning over a short overlap region, making even imperfect loop points sound smooth.
Question 4 Multiple Choice
A producer wants to use a drum break sample from a vinyl record but needs it to play at a different tempo. What is the best approach?
AChange the sample rate of the audio file to match the target tempo
BUse a time-stretching algorithm to adjust tempo independently of pitch
CPitch-shift the sample down to slow it, then use an EQ to compensate
DRecord the sample again at the correct tempo
Time-stretching algorithms (granular, phase vocoder, or elastique) change the playback duration without changing pitch. This is the standard technique for tempo-matching a break sample to a new track's BPM.