How do you edit and manipulate audio in SQA Higher Music Technology using a DAW, and what do you need to know about cutting, comping, quantising, pitch and time correction, sample rate and bit depth?
Using hardware and software to manipulate audio: editing in a DAW (cutting, copying, comping, fades, crossfades), and correcting timing and pitch (quantise, pitch correction, time-stretching), with sample rate and bit depth.
Editing and manipulating audio in SQA Higher Music Technology: DAW editing (cut, copy, comp, fades, crossfades), timing and pitch correction (quantise, pitch correction, time-stretching), looping, and the meaning of sample rate and bit depth for audio quality.
Reviewed by: AI editorial process; not yet individually human-reviewed
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What this dot point is asking
Once audio is captured, it is rarely perfect: takes have wrong notes, loose timing, unwanted noises and rough joins. SQA Higher Music Technology expects you to manipulate recorded audio in a DAW to fix and shape it. This covers editing (cutting, copying, comping, fades and crossfades), correcting timing (quantising) and pitch (pitch correction), changing length (time-stretching) and looping, plus the digital-audio fundamentals, sample rate and bit depth, that determine the quality you are working at. A question asks you to name a technique and explain what it does to the recording. This dot point sets out the toolkit.
The answer
To manipulate audio in a DAW you edit, correct and transform regions of recorded sound. Editing means cutting, copying, moving and trimming regions, comping the best parts of several takes into one, and using fades and crossfades to smooth starts, ends and joins. Quantising snaps timing to a grid; pitch correction moves notes to the right pitch; time-stretching changes length without changing pitch (and pitch-shifting changes pitch without changing length). Looping repeats a region. Underneath it all, sample rate sets the highest frequency that can be captured and bit depth sets the dynamic range and resolution; together they define the audio quality. Knowing what each tool does, and its side effects, is the examinable skill.
Editing: cut, copy, comp, fades
Editing rearranges and tidies recorded audio non-destructively (the original file is untouched; you work with regions pointing at it).
- Cut, copy, paste, trim and move: select a region and remove, duplicate or reposition it, for example to delete a count-in or repeat a chorus.
- Comping: record several takes, then select the best phrases from each and assemble a single composite take that is strong throughout.
- Fades and crossfades: a fade-in or fade-out smooths the start or end of a region; a crossfade overlaps two regions with one fading out as the other fades in, hiding the join (a click or jump) where they meet.
Correcting timing: quantising
Quantising moves recorded hits or notes to the nearest point on a rhythmic grid (the bar divided into beats and subdivisions), tightening loose timing so a part locks to the tempo. It is most associated with drums and rhythmic parts. Full (100 percent) quantising can sound rigid and unnatural, so a strength or percentage and a swing setting are used to keep the feel musical. Quantising applies to MIDI directly and to audio through transient detection.
Correcting and changing pitch
Pitch correction moves sung or played notes to the intended pitch, fixing a flat or sharp note; used gently it is corrective, used hard it produces the audible "tuned" effect. Pitch-shifting transposes audio up or down by a set interval without changing its length. These are separate from time changes, which is a common point of confusion.
Time-stretching and looping
Time-stretching fits audio to a different tempo without altering pitch, letting you align a recorded loop or sample to your project tempo. Looping repeats a region seamlessly, the basis of much electronic and beat-driven music; a clean loop needs the start and end to match (often at zero-crossings) so there is no click on repeat. Both rely on accurate region boundaries.
Sample rate and bit depth
These two settings define the digital audio quality.
- Sample rate is how many times per second the analogue signal is measured during conversion, in kHz. It sets the highest frequency that can be represented (by the sampling theorem, up to half the sample rate). Common values: 44.1 kHz (CD), 48 kHz (video and many studios), 96 kHz (high resolution).
- Bit depth is the number of bits storing each sample. It sets the dynamic range (the span from quietest to loudest) and the resolution of each measurement, so a higher bit depth means lower quantisation noise. Common values: 16-bit (CD, about 96 dB range), 24-bit (recording, about 144 dB range).
Higher settings give better quality but larger files, so projects are recorded at a sensible standard (commonly 24-bit, 44.1 or 48 kHz).
Examples in context
Editing a vocal for the assignment, you might comp the best lines from three takes, trim the silence before each phrase, apply gentle pitch correction to a couple of flat notes, and crossfade the joins so they are inaudible. Each step has a clear purpose and a clear effect you can describe.
Building a beat, you might import a drum loop recorded at a different tempo, time-stretch it to match your project tempo (preserving its pitch), set a clean loop region at zero-crossings, and quantise an added hi-hat part with a little swing so it grooves rather than sounding robotic. The tools are different from the vocal example, but the examinable habit, name the tool and state its effect, is the same.
Try this
Q1. What is comping, and why is it used? [2 marks]
- What the marker wants. Comping assembles a single composite take from the best sections of several recorded takes, so the final track is the strongest performance throughout.
Q2. What is the difference between time-stretching and pitch-shifting? [2 marks]
- What the marker wants. Time-stretching changes duration (tempo) without changing pitch; pitch-shifting changes pitch without changing duration. They are independent in a DAW.
Q3. Does sample rate or bit depth set the dynamic range of digital audio? [2 marks]
- What the marker wants. Bit depth sets the dynamic range and resolution (more bits, wider range, less quantisation noise); sample rate sets the highest frequency that can be captured.
A note on sources
This guide is AI-written and not individually human-reviewed. The editing and manipulation skills follow SQA's Higher Music Technology course specification (C851 76); verify current detail against the SQA Higher Music Technology documents at sqa.org.uk.
Exam-style practice questions
Practice questions written in the style of SQA exam questions on this dot point, with worked answer explainers. The year tag is the paper they imitate, not the source.
Higher specimen4 marksDescribe two editing techniques you could use to improve a recorded drum take, and explain the effect of each. (4 marks)Show worked answer →
An editing-skills question. Two marks for named techniques, two for their effect, so choose techniques you can explain.
Comping is a strong first technique: from several recorded takes you select the best sections and assemble them into one composite take, so the final drum track is the strongest performance throughout. Quantising is a strong second: the DAW snaps the hits to the nearest beat division on the grid, tightening the timing so the groove is even and locks to the tempo. (Note that over-quantising can sound mechanical, so a percentage or "swing" amount keeps it musical.)
Other valid techniques are cutting and crossfading to remove an unwanted noise or join regions cleanly, and adjusting fades to smooth a start or end. The discriminator is explaining the effect on the recording, not just naming the tool.
Higher 20193 marksExplain what sample rate and bit depth control, and give a common setting for each. (3 marks)Show worked answer →
A digital-audio fundamentals question. Marks reward what each controls and a sensible value.
Sample rate is how many times per second the analogue signal is measured during analogue-to-digital conversion; it sets the highest frequency that can be captured (a higher rate captures higher frequencies). A common value is 44.1 kHz (CD quality) or 48 kHz (video and many studios). Bit depth is the number of bits used to store each sample; it sets the dynamic range and the resolution of each measurement (a higher bit depth gives a wider dynamic range and lower quantisation noise). A common value is 24-bit for recording, 16-bit for a CD master.
A weak answer swaps the two. The point is that sample rate relates to frequency range and bit depth relates to dynamic range and resolution.
Related dot points
- Developing audio capture skills: choosing and positioning microphones, setting input levels and gain, and recording sources cleanly without distortion or noise.
Audio capture in SQA Higher Music Technology: choosing microphone types (dynamic, condenser, ribbon), reading polar patterns, positioning mics, setting gain to avoid clipping and noise, and recording sources cleanly for later processing and mixing.
- Understanding the audio signal path and hardware: how sound travels from source through microphones, cables, preamps, audio interfaces and mixing desks to the recording, and how monitoring works.
The audio signal path in SQA Higher Music Technology: how sound travels from source through microphones, cables and connectors, preamps and audio interfaces, mixing desk channel strips, to the recording and monitors, including analogue-to-digital conversion.
- Processing audio: using equalisation (EQ) to shape frequency content and dynamics processing (compression, limiting, gating, normalisation) to control level, and knowing what each does and why.
Audio processing in SQA Higher Music Technology: equalisation (EQ) to boost or cut frequency bands and shape tone, and dynamics processing (compression, limiting, gating, normalisation) to control the loud-quiet range, with the key controls (threshold, ratio, attack, release) explained.
- Mixing and sequencing: balancing levels and panning, using MIDI sequencing and virtual instruments, automation, and producing a stereo mixdown, plus an awareness of mastering.
Mixing and sequencing in SQA Higher Music Technology: balancing levels and panning across the stereo field, MIDI sequencing and virtual instruments, automation of parameters over time, the stereo mixdown (bounce), and an awareness of mastering.
- Explaining how technological developments relate to 20th and 21st century music: how recording, amplification, electronic instruments, multitrack, sampling, MIDI, the DAW and digital distribution changed how music was made and heard.
How technological developments shaped 20th and 21st century music for SQA Higher Music Technology: recording and amplification, electric and electronic instruments, multitrack recording, sampling and drum machines, MIDI, the DAW, and digital distribution and streaming, and how each changed musical style.
Sources & how we know this
- Higher Music Technology Course Specification (C851 76) — SQA (2024)
- Music Technology subject page (Higher) — SQA (2026)