Glossary

Music Production Glossary

115 recording, mixing, synthesis, MIDI and gear terms, explained in plain English. Tap any term for the full definition and its sources. Looking for theory, royalties or live sound? See the complete music glossary.

Updated 2026-08-16

Production and recording

Studio words: what the gear does, what the engineer is asking for, what the session sheet means.

DAW: Digital audio workstation — the software you record, arrange, edit and mix in.
Sample rate: How many times per second an analogue signal is measured on the way to digital.
Bit depth: How finely each sample is measured.
Latency: The delay between playing something and hearing it back through the computer.
Gain staging: Keeping levels sensible at every step so nothing clips and nothing is buried in noise.
Headroom: The space left between your loudest peak and the point of digital clipping.
Polar pattern: The directions a microphone hears from — cardioid, omni, figure-8.
Phantom power (48V): DC voltage sent down a mic cable to power condenser microphones.
Comping: Building one keeper take out of the best pieces of several takes.
Bounce / render / export: Writing your session out to an audio file.
Stem: A submix of one element or group — drums, vocals, keys — printed as its own file for mixing, remixing or live playback.
Click track: The metronome everyone plays to so parts recorded separately line up.
Nyquist frequency: Half the sample rate — the highest frequency a digital system can represent.
Buffer size: How many samples your interface collects before handing them to the CPU.
Punch-in recording: Dropping into record over a defined range so you replace only the bad bar instead of re-tracking the whole pass.
Quantisation: Snapping recorded or programmed notes to a rhythmic grid.
Proximity effect: Directional mics boost low frequencies as the source gets closer.
Pop filter and plosives: Bursts of air from p and b sounds overload a capsule.
Room treatment vs soundproofing: Treatment controls reflections inside a room.
Phase and polarity: Polarity is a flipped waveform; phase is a time offset.
Sample library vs sampler: A library is the recorded content; a sampler is the instrument that maps, loops and plays it back across a keyboard.
Take folder / playlist: A container holding every pass at a part so you can audition and combine them without cluttering the arrangement.

Mixing and mastering

The processing vocabulary, plus the loudness standards streaming services actually measure you against.

EQ (equalisation): Turning specific frequency ranges up or down.
Compression: Automatic level control: above a threshold, gain is reduced by a ratio, shaped by attack and release times.
Sidechain: Using one signal to control processing on another — most famously ducking a bass or pad every time the kick hits.
Reverb: Simulated space.
Delay: Repeats of the signal, usually timed to the tempo.
Saturation and distortion: Adding harmonics by pushing a circuit or algorithm past clean.
LUFS: Loudness Units relative to Full Scale — the perceptual loudness measure streaming platforms normalise with, defined in ITU-R BS.1770.
True peak: The real analogue peak an inter-sample reconstruction can hit — often higher than your meter's sample peak.
Dynamic range: The distance between the quietest and loudest moments.
Limiter: A compressor with an extreme ratio and a brick-wall ceiling, used at the end of a master to control peaks.
Mid/side: Splitting a stereo signal into what's shared (mid) and what differs (side) so you can process centre and width separately.
Dither: Low-level noise added when reducing bit depth so quantisation error becomes hiss instead of distortion.
Panning and stereo image: Where a source sits between the speakers, and how wide the whole mix reads.
Bus and aux send: A bus collects several tracks for shared processing.
Parallel compression: Blending a heavily compressed copy under the untouched signal.
Transient: The short, loud attack at the front of a sound.
Q and filter slope: Q sets how narrow an EQ band is; slope (dB per octave) sets how hard a high- or low-pass cuts past its corner frequency.
High-pass filter: Removes low frequencies below a set point.
Automation: Recorded changes to any parameter over time.
Reference track: A commercially released song you A/B against, level-matched, to check tonal balance and loudness decisions against something known.
Intersample peak: A peak that appears between samples after conversion back to analogue.
Mastering: The final stage: tonal balance, loudness, sequencing, spacing and delivery formats for a whole release rather than one track.

Synthesis and sound design

How synths make sound, in the order the signal actually travels.

Oscillator (VCO/DCO): The sound source.
Filter (VCF): Removes or emphasises frequencies.
Envelope (ADSR): Attack, decay, sustain, release — how a parameter moves over the life of a note.
LFO: Low-frequency oscillator: a slow wave used as modulation rather than sound.
Subtractive synthesis: Start with a harmonically rich waveform and filter material away.
FM synthesis: One oscillator modulates another's frequency, generating sidebands.
Wavetable synthesis: Scanning through a table of single-cycle waveforms so the timbre morphs over time.
Granular synthesis: Chopping audio into tiny grains and replaying them at varying rate, pitch and density to make clouds and textures.
Polyphony / paraphony / monophony: How many notes a synth can play at once, and whether each note gets its own full voice path or shares a filter.
Modulation matrix: A routing grid that connects sources (LFOs, envelopes, velocity) to destinations (cutoff, pitch, pan) with an amount for each.
CV/Gate: Control voltage sets pitch or parameter value; gate says note-on/note-off.
Aliasing: Digital artefacts created when harmonics go above half the sample rate and fold back down as inharmonic junk.
Additive synthesis: Building a sound by stacking sine waves at chosen frequencies and levels — the inverse of subtractive, and the basis of spectral resynthesis.
Physical modelling: Synthesis by simulating the physics of a string, tube or membrane instead of replaying a recording of one.
Ring modulation: Multiplying two signals so you hear only their sum and difference frequencies.
Pulse width modulation: Sweeping the duty cycle of a square wave.
Portamento / glide: A continuous slide in pitch between two notes rather than a jump.
Unison and detune: Stacking several voices on one note and detuning them slightly.
Velocity sensitivity: How hard a key is struck, sent as a MIDI value and usually mapped to level and filter brightness so playing dynamics survive.
Arpeggiator: A sequencer that plays a held chord one note at a time in a pattern, locked to tempo.
Sequencer: A pattern recorder that fires notes or CV at set steps.
Oversampling: Running a process at a multiple of the project sample rate so distortion products land above the audible band before being filtered out.

MIDI, formats and standards

The plumbing — the specs your gear, files and delivery pipeline agree on.

MIDI: A control protocol, not audio.
MIDI 2.0: The 2020-era update: bidirectional, higher resolution, per-note controllers and profile-based auto-configuration.
MPE: MIDI Polyphonic Expression — each note gets its own channel so pitch bend, pressure and slide are per-note.
WAV vs FLAC vs MP3/AAC: WAV is uncompressed PCM; FLAC is lossless compression; MP3 and AAC are lossy.
Plugin formats (VST/AU/AAX/CLAP): The interfaces that let third-party processors run inside a DAW.
ASIO / Core Audio: Low-latency audio driver systems on Windows and macOS respectively.
Sync: MIDI clock, MTC, Ableton Link: Different ways to keep devices in time — clock pulses, timecode, or peer-to-peer tempo sharing over a network.
Metadata (ISRC, UPC, ISWC): The identifiers that route money and credits: recordings get ISRCs, releases get UPCs, compositions get ISWCs.
DDEX: The messaging standards distributors, labels and DSPs use to exchange release and royalty data.
C2PA / content credentials: An open provenance standard for signing how a piece of media was made — increasingly relevant to AI disclosure.
Sample-accurate automation: Parameter changes calculated per audio sample rather than per processing block, so sweeps stay smooth and click-free.
Loudness normalisation: Platforms play everything back at a target loudness, so a louder master mostly just gets turned down.
Buffer underrun / dropout: The CPU misses its deadline and the audio device plays empty samples, heard as a click or gap.
Sample rate conversion: Resampling audio between rates.
Lossy vs lossless: Lossless coding reconstructs the original samples exactly; lossy coding discards detail the model predicts you will not hear, and cannot be undone.
Opus: An open, royalty-free codec standardised as RFC 6716.
Broadcast WAV (BWF): A WAV file with an embedded metadata chunk carrying timecode, originator and coding history.
Timecode (SMPTE/LTC): A frame-accurate clock stamped onto audio or video so separately recorded media can be aligned later.
Dante and AES67: Networked audio over standard Ethernet.
Sample-rate clock and jitter: Digital devices need one master clock.
Open-source audio tooling: Audacity, Ardour, Surge XT and the Xiph codecs are all free to use and inspect, which makes them dependable teaching references.

Gear, instruments and tools

The boxes, controllers and sample formats a producer is expected to know by name — from the MPC to a one-shot.

MPC: Akai's Music Production Center: a sampler, sequencer and drum machine in one box, played from 16 velocity-sensitive pads.
One-shot: A single, non-looping sample fired once per trigger — one kick, one snare, one stab.
Loop (sample): A bar or phrase of audio designed to repeat seamlessly at a stated tempo and key.
Sampler: Any instrument that plays recorded audio back at different pitches and start points.
Drum machine: A dedicated box for programming drums, either from synthesised voices (TR-808, TR-909) or samples.
Groovebox: A self-contained beat machine: sampler or synth voices, a sequencer, effects and often a battery, so a full track can be made without a computer.
Sample pack: A licensed folder of one-shots, loops and multisamples sold or given away for use in your own records.
Chopping: Slicing a longer sample into pieces and reassigning them to pads or keys so you can replay the source in a new order.
Pad controller: A grid of velocity-sensitive rubber pads — usually 8 or 16 — for finger drumming and triggering clips.
MIDI keyboard controller: A keyboard that sends note, velocity and controller data rather than making sound.
Keybed: The physical key mechanism under a keyboard: synth-action (light, springy), semi-weighted, or hammer-action (piano-like).
Aftertouch: Pressure applied after a key is already down, sent as extra modulation.
Audio interface: The box that converts microphones and instruments into digital audio and sends playback back out.
Preamp: The gain stage that lifts a microphone's tiny signal up to line level before conversion.
Studio monitors: Speakers designed to be revealing rather than flattering, so mix problems are audible.
Open-back vs closed-back headphones: Closed-back seals in sound and blocks bleed, which is why they live on the mic stand for tracking.
Condenser vs dynamic microphone: Condensers need phantom power, hear detail and hear your room.
Shock mount: An elastic cradle that suspends a microphone so desk knocks, foot taps and floor rumble do not travel up the stand into the capsule.
Guitar pedal (stompbox): A floor-mounted effect between instrument and amp — overdrive, delay, reverb, modulation.
Combo amp: An amplifier and speaker in one cabinet.
Amp modelling: Digital recreation of amplifiers, cabinets and mics, either in a plugin or inside the amp itself.
Pickup (magnetic vs piezo): Magnetic pickups sense steel strings moving in a field — the electric guitar sound.
Patchbay: A panel of jacks that brings every input and output in a studio to one place so you re-route with a short cable instead of crawling behind racks.
TS, TRS and XLR: TS is unbalanced instrument cable, TRS is balanced (or stereo), XLR is balanced with a locking connector and carries phantom power.
Field recorder: A portable recorder with built-in mics, preamps and its own storage — used for foley, room tone, interviews and sampling sources that will never fit in a studio.
DAW control surface: Physical faders, knobs and transport buttons that drive your DAW over MIDI or Mackie/HUI protocol.
Sustain pedal: A footswitch sending MIDI CC 64.
Eurorack: The dominant modular synth format: 3U-high modules sharing a case, power bus and 3.5 mm patch cables.

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