Music Production Glossary

Attack, Decay, Sustain, Release. The four stages of a synthesizer envelope that shape how a sound evolves over time. Attack is how fast the sound reaches peak volume. Decay is how quickly it falls to the sustain level. Sustain is the held volume. Release is how long it fades after you let go.

The standard tuning pitch where A4 (the A above middle C) equals 440 Hz. Adopted as the international standard (ISO 16) in 1955. All modern instruments, DAWs, and sample libraries default to A440. The note frequency calculator shows every note's Hz value at A440 standard.

A MIDI effect that plays the notes of a chord one at a time in a sequence (up, down, random, etc.) instead of simultaneously. Creates melodic patterns from held chords. Common in house, trance, and electronic music.

How quickly a sound reaches its peak level after being triggered. Short attack: sound appears instantly. Long attack: sound fades in gradually. Critical for both ADSR envelopes and compressor settings.

Hardware that connects microphones, instruments, and speakers to your computer. Converts analog audio to digital (ADC) and back (DAC). Essential for recording at low latency with professional sound quality.

Beats Per Minute. The tempo of a track. Hip-hop typically runs 70-100 BPM. House music runs 120-130 BPM. Drum and bass runs 160-180 BPM. Detecting the BPM of any audio file is the core function of the BeatKey BPM detector.

Exporting your finished mix or stem to an audio file. Also called "render" or "export." When you bounce a track, you commit your plugin settings and automation to a flat audio file. Common formats: WAV (lossless), MP3 (compressed), FLAC (lossless compressed).

A routing destination that multiple tracks send audio to. A drum bus groups kick, snare, and hi-hats so you can process them together with one compressor or EQ. A master bus is the final output that all tracks feed into.

A color-coded key notation system used by DJs for harmonic mixing. Each of the 12 musical keys is assigned a number (1-12) and letter (A for minor, B for major). Adjacent Camelot codes mix harmonically (e.g., 8A mixes with 7A, 9A, and 8B). BeatKey detects the Camelot code of any audio file automatically.

Three or more notes played simultaneously. The most common chords are major (happy, bright), minor (sad, dark), dominant 7th (tense, bluesy), and major 7th (smooth, jazz). Understanding chord progressions is essential for sampling and production.

A sequence of chords that forms the harmonic foundation of a song. The I-V-vi-IV progression (C-G-Am-F in C major) appears in hundreds of pop songs. Minor progressions like i-bVII-bVI (Am-G-F) are common in hip-hop and R&B.

All 12 notes within an octave (every semitone). C-C#-D-D#-E-F-F#-G-G#-A-A#-B. The chromatic scale is the foundation of Western music theory. All other scales and modes are subsets of the chromatic scale.

A diagram showing the 12 major and minor keys arranged so adjacent keys share the most notes. Moving clockwise adds one sharp. Moving counter-clockwise adds one flat. The Camelot Wheel is the Circle of Fifths with numbers instead of letter names, used by DJs for harmonic mixing.

A region of audio or MIDI within a DAW timeline. Audio clips contain recorded or imported audio. MIDI clips contain note data that triggers instruments. Clips can be looped, stretched, reversed, and processed independently.

A dynamic processing technique that reduces the volume difference between loud and quiet parts of audio. Threshold sets when compression starts. Ratio determines how much compression is applied. Attack and release control the timing. Used on vocals, drums, bass, and the master bus.

The practice of searching through vinyl records (or digital libraries) for samples to use in new music. Originally referred to flipping through stacks of records at thrift stores. Now also used for browsing sample packs, streaming libraries, or YouTube for production material.

Digital Audio Workstation. Software used to record, edit, arrange, and mix music. Common DAWs: FL Studio (hip-hop, trap), Ableton Live (electronic, house), Logic Pro (Mac, pop), GarageBand (Mac, beginners), Reaper (audio engineering), Pro Tools (professional studio).

The second stage of an ADSR envelope. After a sound reaches its peak volume (Attack), Decay is how quickly it falls to the Sustain level. Short decay: punchy sounds. Long decay: fading sounds like piano notes.

An audio effect that records a signal and plays it back after a set time, creating echo-like repeats. Types include slapback (40-200ms, 0 feedback), dotted eighth (rhythmic, syncopated), ping-pong (alternating left/right), and tape delay (warm, analog character). BPM-synced delay times maintain rhythmic feel.

Notes or chords that belong to a specific key or scale without alteration. A diatonic chord progression stays within the key. Non-diatonic chords (borrowed chords, secondary dominants) are borrowed from related keys for color and tension.

The second mode of the major scale. Like natural minor but with a raised 6th degree. Sounds soulful and funky. Used extensively in hip-hop, jazz, R&B, and funk. The i7-IV7 chord vamp (Am7-D7 in A Dorian) is a signature Dorian sound.

A note that is 1.5x the duration of a standard eighth note. At 120 BPM, a dotted eighth note equals 375ms. Used for the iconic "The Edge delay" sound (U2) and many rhythmic delay patterns. The delay calculator gives you the exact ms for your BPM.

The variation in loudness throughout a musical performance or production. Dynamic range is the difference between the quietest and loudest parts. Compression reduces dynamics. Good mixing preserves enough dynamics to feel alive while maintaining commercial loudness.

A control signal that shapes how a parameter (usually volume or filter cutoff) changes over time. Defined by ADSR stages: Attack, Decay, Sustain, Release. Almost every synthesizer and sampler has at least one envelope for amplitude control.

A tool that boosts or cuts specific frequency ranges. Low frequencies (20-200 Hz): bass and kick. Mids (200 Hz-4 kHz): vocals, guitars, presence. Highs (4-20 kHz): air, brightness. A high-pass filter cuts everything below a set frequency. Every note corresponds to a specific Hz value.

Short for "sample flip." Taking an existing recording and repurposing it as the foundation of a new beat or track. Common techniques: chopping, pitching, reversing, loop isolation, and layering. Finding the original key is essential before flipping a sample.

The number of vibrations per second, measured in Hz (hertz). Determines the pitch of a sound. A4 = 440 Hz. C4 (middle C) = 261.63 Hz. Low frequencies: bass and sub. High frequencies: treble and air. The note frequency calculator converts any Hz value to a note name.

The lowest frequency in a complex sound, which defines the perceived pitch. The overtones and harmonics above the fundamental give a sound its timbre or character. An 808 bass drum's fundamental determines what note it sounds like when you hear it in a mix.

The amplification of a signal. Input gain boosts a signal before processing. Output gain controls the final level after processing. Gain staging is the practice of setting appropriate levels at each point in the signal chain to avoid distortion and maintain headroom.

The visual timing reference in a DAW that aligns to beats and bars. Notes and clips snap to the grid for rhythmic accuracy. Quantization corrects MIDI notes to the nearest grid position. Triplet and swing grids create rhythmic feel beyond straight quantization.

DJing technique where tracks are mixed based on musical key compatibility. Songs in the same key or compatible keys (adjacent on the Camelot Wheel) transition smoothly. Songs in incompatible keys clash. BeatKey detects the key and Camelot code of any track.

The space between the peak level of your mix and the clipping point (0 dBFS). Leaving headroom (typically -6 to -3 dBFS on the master) gives mastering engineers room to work and prevents digital distortion. Loudness wars have pushed mixes to sacrifice headroom for perceived volume.

A pair of cymbals in a drum kit controlled by a foot pedal. Open hi-hats (OHH) sustain freely. Closed hi-hats (CHH) are tight and short. In production, hi-hat patterns define the groove and feel of a beat. Trap music uses rapid 16th-note hi-hat rolls for energy.

Hertz. The unit of frequency, measuring cycles per second. A4 = 440 Hz. Human hearing range: 20 Hz to 20,000 Hz (20 kHz). Every musical note has a specific Hz value. The note frequency calculator converts between note names and Hz.

A chord voicing where a note other than the root is in the bass. First inversion: the 3rd in the bass (C/E). Second inversion: the 5th in the bass (C/G). Inversions create smoother voice leading and movement between chords.

Another name for the melodic minor scale (ascending form). Has a raised 6th and 7th degree compared to natural minor. Used in jazz for over dominant chords. The iminM7 chord is the signature sound of jazz minor harmony.

The tonal center of a piece of music. All other notes and chords relate to the key note (tonic). A song in C major uses the C major scale as its foundation. Detecting the musical key of a sample before pitching or flipping it prevents clashing notes in your mix.

The sharps or flats written at the beginning of a staff that indicate the key of a piece. C major has no sharps or flats. G major has one sharp (F#). F major has one flat (Bb). Each key signature defines which notes are raised or lowered throughout a piece.

The large bass drum in a drum kit, triggered by a foot pedal. In electronic music, the kick provides the low-end punch and drives the tempo. Typical kick fundamental frequency: 60-100 Hz. 808 sub-bass kicks (used in trap and hip-hop) extend much lower to 40-60 Hz.

Stacking multiple sounds to create one richer sound. Common layering: 808 sub under a kick for weight, multiple synth sounds for a lead patch, multiple vocal recordings for a chorus. When layering, ensure all layers are in tune and check for phase cancellation.

A compressor with an extreme ratio (infinity:1 or higher) that prevents a signal from exceeding a set ceiling. Used on the master bus to prevent digital clipping while maximizing loudness. Common in mastering to hit streaming loudness targets (-14 LUFS for Spotify).

A production aesthetic that intentionally includes sonic imperfections: vinyl crackle, tape saturation, low-pass filtering, pitch wobble, dusty samples. Originally a recording approach, now a genre in itself. Lo-fi hip-hop (80-90 BPM, jazz-influenced samples, mellow melodies) is one of the most streamed genres on YouTube.

A short audio segment designed to repeat seamlessly. A loop has a specific BPM and key that must match the song you place it in. BeatKey detects the BPM and key of any loop file so you can match it to your project before importing.

Loudness Units Full Scale. A measurement of perceived loudness over time. Streaming platforms normalize audio to specific LUFS targets: Spotify -14 LUFS, Apple Music -16 LUFS, YouTube -14 LUFS. Mastering to the correct LUFS prevents your track from being turned down (or sounding crushed).

The foundational scale in Western music. Seven notes following the pattern W-W-H-W-W-W-H (whole steps and half steps). Sounds bright and happy. All modes are derived from the major scale by starting on different degrees.

Musical Instrument Digital Interface. A protocol that communicates note data (pitch, velocity, timing) between instruments and software. MIDI does not contain audio. Each note has a MIDI number (60 = middle C). Velocity (0-127) controls dynamics. MIDI makes it easy to edit notes after recording.

The natural minor scale follows the pattern W-H-W-W-H-W-W. Sounds sad, dark, or emotional. The relative minor of C major is A minor (same notes, different starting point). Three types: natural minor, harmonic minor (raised 7th), and melodic minor (raised 6th and 7th).

The process of balancing volume, EQ, compression, and effects across all tracks to create a cohesive final sound. A good mix is clear (each element audible), balanced (no frequency range dominates), and dynamic (with life and movement). Mixing is a skill separate from producing or recording.

The fifth mode of the major scale. Like major but with a flattened 7th degree (b7). Sounds rock, bluesy, and country. The I-bVII-IV progression (D-C-G in D Mixolydian) appears in countless rock songs. "Sweet Home Alabama" is a famous Mixolydian track.

A scale derived from the major scale by starting on a different degree. The 7 modes: Ionian (major), Dorian, Phrygian, Lydian, Mixolydian, Aeolian (minor), Locrian. Each mode has a distinct emotional character and is favored by different genres.

Changing a parameter over time. Modulation in synthesis: using LFOs (Low Frequency Oscillators) or envelopes to change pitch, filter cutoff, or panning. Modulation in harmony: changing key centers within a piece for dramatic effect. Both uses create movement and interest.

Mono audio has one channel. Stereo audio has two channels (left and right). Check your mix in mono to catch phase cancellation and ensure it translates to devices that sum to mono (some phones, clubs). Sub bass, kick, and lead vocals usually work better in mono.

A specific pitch with a name and octave. Notes are named A through G with sharps (#) and flats (b) for the black keys. Middle C is C4 (MIDI 60) at 261.63 Hz. Each note has a specific Hz frequency that determines its pitch.

The interval between two notes with the same name where the higher note vibrates exactly twice as fast. C3 is one octave below C4. A4 = 440 Hz; A5 = 880 Hz; A3 = 220 Hz. MIDI note numbers go up by 12 for each octave.

Recording a new performance on top of existing recorded tracks. The overdub plays back existing audio while recording new material. Common in vocal production: lay down a guide vocal, then overdub the polished final take.

Positioning a sound in the stereo field from left to right. Hard left = 100% left channel. Hard right = 100% right channel. Center = equal in both channels. Panning creates width and space in a mix. Bass and kick are typically centered. Guitars and synths are often panned left and right.

A 5-note scale (the major scale minus the 4th and 7th). Two types: major pentatonic (bright, country, pop) and minor pentatonic (bluesy, rock, hip-hop). The minor pentatonic adds the blue note (b5) to become the blues scale. Pentatonic scales are easy to improvise over because they contain no semitones that clash.

A musical idea that forms a complete thought, typically 4 or 8 bars long. Building productions in phrases (intro, verse, chorus, breakdown, drop) creates narrative and keeps listeners engaged. Most electronic music structures are built in 16 or 32 bar phrases.

The third mode of the major scale. Like natural minor but with a flattened 2nd degree (b2). Dark, exotic, Mediterranean sound. Used in flamenco, metal, film scores, and dark trap. The signature Phrygian chord is the bII (the chord built on the flat 2nd).

How high or low a sound is perceived. Determined by frequency (Hz). Higher Hz = higher pitch. Pitch correction (Auto-Tune, Melodyne) adjusts the pitch of recorded vocals or instruments. Pitch shifting changes pitch without affecting tempo.

Software that runs inside a DAW to provide instruments (VST, AU) or audio effects (compressors, EQ, reverb, delay). Third-party plugins expand a DAW's capabilities. Free plugins like Vital (synth), Melda (effects), and TDR Nova (EQ) can rival paid options.

Two or more rhythms with different pulses played simultaneously. A common polyrhythm: 3 against 4 (triplets in 4/4 time). Polyrhythms create rhythmic tension and interest. Afrobeat and certain hip-hop producers use polyrhythms extensively for complex groove.

Automatically correcting the timing of MIDI notes to align with the nearest grid position (beat, half beat, 16th note, etc.). Full quantize creates robotic precision. Partial quantize moves notes toward the grid while preserving human timing feel.

An effect that simulates the reflection of sound in a space. Types: room (small, natural), plate (metallic, classic), hall (large, spacious), spring (vintage, surf). Key parameters: decay (how long the reverb lasts), pre-delay (gap before reverb starts, synced to BPM), and mix (how much reverb vs dry signal).

A system for notating chords relative to the key. I = tonic chord, IV = subdominant, V = dominant. Uppercase = major chord, lowercase = minor chord. In C major: I=C, ii=Dm, iii=Em, IV=F, V=G, vi=Am, vii=Bdim. Roman numeral notation works in any key.

A short recorded sound or section of an existing song used in new music. Samples must be identified, cleared (licensed), or transformed significantly enough to qualify as fair use. Before flipping a sample, use BeatKey to detect its BPM and musical key so your new production is in tune.

A set of notes in a specific pattern of intervals. The major scale has 7 notes following W-W-H-W-W-W-H. The minor pentatonic has 5 notes. Each scale has a characteristic sound and works over specific chord progressions. Scale Finder gives you the notes for 18+ scales in any key.

Routing one audio signal to control the dynamics of another. Classic technique: kick drum sidechains the bass, causing the bass to duck every time the kick hits. Creates the pumping sound common in house and electronic music. Also used creatively for rhythmic effects.

A short delay (40-200ms) with zero feedback repeats, creating a single echo. The signature effect of 1950s rockabilly recordings (Sun Records, Elvis Presley). Short slapback (40-80ms): modern hip-hop vocals. Longer slapback (100-200ms): classic rock, country, surf.

A group of tracks mixed together as a single audio file. A drum stem contains all drum elements bounced together. A vocals stem contains all vocal tracks. Stems allow collaboration (share only stems, not individual tracks) and live performance (trigger stems from a laptop or Ableton).

The very low frequencies below 80 Hz that you feel more than hear. 808 sub kicks and sub bass lines live in this range. Sub bass is mono and centered. Too much sub bass on headphones versus speakers can be deceptive. Use a spectrum analyzer and check your mix on multiple systems.

A rhythmic feel where alternating 16th notes or 8th notes are slightly offset from an even grid, creating a groove. Swing percentage controls how much the off-beats are pushed back. High swing (70%+) creates a jazz or hip-hop shuffle feel. Low swing (50%) is straight time.

Short for synthesizer. An instrument that generates sound electronically. Types: subtractive (Moog, Roland), FM (Yamaha DX7), wavetable (Serum, Vital), analog (Korg), software (any VST). Synthesizers are the core of electronic and hip-hop music production.

The speed of music measured in BPM (beats per minute). Tempo determines the overall energy and feel of a track. Setting the right tempo before importing samples ensures loops and one-shots align to the grid. BeatKey detects the exact tempo of any audio file.

The meter of a piece of music, written as a fraction. 4/4 (four quarter notes per bar) is the most common in popular music. 3/4 is a waltz. 6/8 creates a compound feel. 7/8 and 5/4 create unusual, asymmetric rhythms used in prog rock and jazz.

The first and most stable note of a scale. The "home" of a key. In C major, C is the tonic. Melodies and chord progressions return to the tonic for resolution and rest. Ending a phrase on the tonic (I chord) feels resolved. Ending on the V chord creates tension.

The initial attack portion of a sound, usually the loudest and shortest part. Drum hits have strong transients. Transient shapers can enhance or reduce the punch of drums. Excessive compression can crush transients, making drums sound dull and lifeless.

Shifting all notes up or down by a fixed interval (semitones or octaves). Transposing a sample up 2 semitones changes D minor to E minor. Use the key transposer to find the exact semitone distance between any two keys instantly.

How hard a MIDI note is triggered, measured 0-127. High velocity = loud note. Low velocity = soft note. Varying velocity in MIDI programming creates dynamics and human feel. Flat velocity (all notes at 100) sounds robotic. Use velocity automation for expression in hi-hats, pads, and melodies.

Analog audio stored on a rotating disc, read by a needle. Vinyl records have a warm, compressed sound with gentle high-frequency rolloff and characteristic crackle. Lo-fi producers sample vinyl or apply vinyl emulation effects to add warmth and nostalgia to digital productions.

An effect that analyzes the frequency content of one signal (the modulator, usually a voice) and applies it to another signal (the carrier, usually a synth). Creates the robotic voice effect heard in Daft Punk and T-Pain (though T-Pain used Auto-Tune, not vocoder).

Virtual Studio Technology. A plugin format developed by Steinberg that allows third-party instruments and effects to run inside a DAW. VST is the most widely supported plugin format on Windows. Mac uses both VST and AU (Audio Units). VST3 is the latest version with improved performance.

The visual representation of a sound's amplitude over time. Sine waves are the purest, containing only one frequency. Square waves are rich in odd harmonics. Sawtooth waves contain all harmonics. Real-world sounds have complex waveforms made of many overlapping frequencies.

Wet signal = the processed/effected signal. Dry signal = the original unprocessed signal. Mix control on effects blend wet and dry. 100% wet = full effect, no original signal. 0% wet (100% dry) = bypass. Most reverbs and delays work best at 20-40% wet on a send/return bus.

Ableton Live's feature for time-stretching audio clips to match the project tempo. Warp markers anchor specific beats in the audio to the project grid. BeatKey can verify whether Ableton's auto-warp BPM detection is correct before committing, preventing double-time or half-time errors.

A balanced audio connector with 3 pins, used for microphones, studio monitors, and audio interfaces. XLR cables reject interference over long runs because of balanced audio design. Phantom power (48V for condenser microphones) is delivered through XLR.

The point where an audio waveform crosses the zero amplitude line. Cutting samples at zero crossings prevents clicks and pops. Most DAWs can snap edits to zero crossings automatically. Important when chopping samples for a beat or creating seamless loops.