A singing part with no beat under it, played on its own or laid over another song’s beat.
On the decks Spelled “acapella” in DJ pools and on forums. DJs lay one over an instrumental, or ride it into a stretch of the playing song where nobody sings.
In Deckie The crate file records vocal‑free gaps of 8 bars or more, where an acapella could fit. Deckie makes no acapellas; pointing at the gap on screen is planned.
The record is spun backwards for a beat with a whoosh, and the next song lands on the hit.
On the decks Both words are used. Video tutorials say “spinback” and “backspin”; UK and trance DJs tend to say spinback, US DJs and turntablists backspin. Fun, DJs agree, but cheesy if overused.
In Deckie Blend lengths are labelled in bars. Most songs are four beats to the bar, but Deckie records the real number for each song, since some are in three.
Only one song carries the deep bass at a time, so at some point the bass jumps from the old song to the new one.
On the decks Kill the bass of the incoming song, then trade the two at the start of a phrase. DJs say “swap the basslines” or “switch the lows”, and the forum rule of thumb is never two basslines at once.
Also calledswitch lows(forums), bass switch(forums), kill the bass(all, the incoming side), swap the basslines(house forums), EQ swap, low swap, hard swap(slang)
In Deckie Deckie fits one steady grid to the beats it hears and scores how well it fits. Bars and mix windows are measured against it; a poor fit makes Deckie prefer cuts and echo outs over blends.
The two songs overlap for a while, and the low end moves from one to the other halfway through.
On the decks “Blend” is the everyday verb: DJs “blend tunes” with filters and EQ, around 16 bars in house. In hip‑hop mixtapes a blend is an acapella laid over another record’s beat.
Also calledmix(all), beatmix, 16‑bar bass swap, EQ swap
In Deckie Shown as “Blend · 16 bars”, the middle length. The bar count is there so a hip‑hop DJ, for whom a blend means something else, reads it the house way.
A clock face of keys numbered 1 to 12, so you can see at a glance which songs fit.
On the decks Codes 1A to 12B from Mixed In Key (A for minor, B for major); a step of +2 is what it calls an “energy boost”. Traktor’s Open Key is the same wheel, numbered differently.
Flicking between the two songs a bar or two at a time before letting the new one take over.
On the decks DJs “cut and chop” with the crossfader, switching back and forth between two songs. Not “chopped and screwed”, a slowed‑down style from Houston.
Also calledcutting back and forth(forums), chop mix, fader cuts, switching back and forth(forums)
In DeckiePlanned “Chop · back and forth” among the move tiles. Deckie cannot follow chops yet: it waits until one song clearly takes over before it changes the screen.
In Deckie The status line says sure, likely or unsure, from how many recent matches agree and how well their timing lines up. A new song replaces the old one on screen only once it clearly wins: a few seconds after a cut, about 10 seconds into a blend.
In Deckie The crate is the songs; the crate file is what Deckie knows about them. Deckie Desk reads your crate and writes a crate file. Edits, bootlegs, live sets and burned CDs count the same as releases.
In Deckie Analysis, names and fingerprints, never audio. It moves by AirDrop, iCloud Drive or Files, with no server in between. Never called just “the crate”: the crate is the songs.
The new song starts exactly on the first beat of a musical section, so the switch lands where it feels natural.
On the decks “Drop it on the one”, DJs say: start the new song on the first beat of a phrase. “Drop on the four” is when its singing starts a beat early.
Also calleddrop it on the one(hip‑hop, open format), on the one, dropmix, drop mixing(DJ schools)
In Deckie Listens to the room, names the playing song, reads the pitch and ranks what could come next. Pin a pick, turn the Shuffle dial, or search the rest of the crate.
In Deckie Point it at a folder: it analyses the songs, makes their fingerprints, lets you fix names and sort songs into discs and folders, and writes the crate file. Name changes live in the crate file, never in your music files. A list of songs it could not name is planned.
In Deckie Sorted in Deckie Desk, in the order your player shows them. Deckie Booth names the playing song with its disc, folder and track, lists the discs on its CDs tab, and gives each disc a chip to switch it on or off in the picks; All adds songs on no disc.
The next song arrives through an echo: its first hits ring in over the playing song before it lands clean on the beat.
On the decks The mirror of echo out: send the next song’s first hits through an echo timed to the beat, then turn the echo off as it lands on the one. Tutorials teach the pieces but give it no name; “echo in” is Deckie’s.
The old song stops on a beat and its echo keeps ringing while the new song starts.
On the decks Said as “echo out” or “echoed out” on forums and in video titles; “echo freeze” holds the tail. Stop the old song on the one and let its echo ring under the new one.
Also calledechoed out(verb, forums), echo freeze(Traktor, rekordbox users), delay out, freeze(Traktor), wash‑out(tutorials), FX out
Alsodry vocal, vocal breakdown, the vocal on its own
A stretch where the voice carries on while the drums and bass drop away.
On the decks Producers say “the vocal is exposed” or “dry vocal”; DJs call the same bars a breakdown with vocals. Loud and clear, so it clashes with any other voice and sits well over a beat‑only intro.
In Deckie The crate file marks bars where the voice is left on its own, estimated from the low end and how busy the drums are, and labelled as an estimate.
In Deckie When Deckie’s own reading is exactly half or double the tempo written in the file, it takes the file’s. Learning how each DJ hears tempo is planned.
The playing song gets thinner and thinner, as if heard through a wall, while the next one rises underneath.
On the decks DJs say “filter sweep” or “sweep the filter to high pass”: cut the lows until only the thin top is left. “Filter fade” is the tutorial name.
Also calledfilter fade(tutorials), sweep the filter(forums), lo‑cut(Pioneer DJs), HPF out, sweep out, filter mix
In Deckie Deckie Desk makes one from each of your songs, a few tens of kilobytes each, and they travel in the crate file. On the iPad, Apple’s ShazamKit matches against those alone, offline: Deckie carries no catalogue of other music. Today each matches within about 4 percent of the song’s own speed; covering the whole pitch fader is planned.
Two songs can match even when one is twice as fast as the other, because every second beat lines up.
On the decks Drum and bass and trap DJs say “halftime”; DJs mixing hip‑hop into dance music talk about “doubling” the slow song. 87 BPM against 174, 95 against 190.
Also calledhalftime(drum and bass, trap), double time, doubling(forums), 2x
In Deckie Deckie’s analysis proposes up to three likely hooks per song, from repetition, loudness and singing; confirming one with a tap is planned. It cannot know which line people know by heart: that is not in the audio.
In DeckiePlanned about a dozen habits learned on the device, such as how far you push the pitch, how strict you are about key and how long you blend, and settings in DJ words, such as blends or cuts first, and whether two vocals may overlap. Learning moves only a small mark beside each setting, never one you set, and says what it changed. A saved pair teaches it most.
In Deckie Drawn for each pick, with the beat and bar lines. Tapping it cycles the next song’s start: mix‑in, track start, steady beat, then every 8 bars.
In Deckie Each song gets a key, shown as a Camelot code, with any key change marked. No key reader is right every time, most often mixing up major and minor, so Deckie marks a key it is unsure of. A clash is a warning, not a score to chase.
In Deckie A pick’s line says “key clash”. Planned: a key setting with three choices, Off, Flag clashes and In key first; In key first also stops the longest blends on a clash.
A switch that lets you speed a song up without making the singer sound higher.
On the decks Keeps the key while the tempo changes. Pioneer calls it MASTER TEMPO; Serato and Traktor say Keylock. With it off, a faster record also sounds higher, the old vinyl way.
Also calledmaster tempo, keylock, pitch lock, MT, time stretch
In Deckie Deckie reads the pitch either way: with key lock off, from how much higher or lower the song sounds; with it on, from how fast the song runs ahead of the clock. Today a key‑locked change past about 4 or 5 percent may not be recognised. A setup question about key lock is planned.
Moving a song up or down one note so it sits in tune with the other.
On the decks A word from the gear: KEY SHIFT on Pioneer’s CDJ‑3000, Pitch ‘n Time in Serato. DJs rarely change a song’s key, and when they do it is by one semitone.
Both songs play together for a long stretch, a minute or more, so the change is hard to hear.
On the decks Forum DJs say “long blends” or “long mixes”, and one puts the aim as “long and smooth, perfectly in phrase”. 16 to 32 bars is the house and techno default.
Also calledlong mix(house, techno, drum and bass), long and smooth(forums), seamless blend(tutorials), progressive mix, 32‑bar
The last beat repeats faster and faster, like a drum roll, and the next song lands on the hit.
On the decks Said as is, from the pad names in Serato and on Pioneer gear; Traktor users say Beatmasher. Not Serato’s old “Roll Out”, which is a brake‑style effect.
Also calledroll(Pioneer), slip roll(Pioneer DJM), Beatmasher(Traktor users), beat roll, stutter
In Deckie Same screen, same picks: the playing song keeps its wave and each pick becomes a compact pill with title, artist, folder, BPM and pitch, and the move.
In Deckie Marked IN on the song’s wave, 8, 16 or 32 bars long depending on how much intro there is without singing. Tapping a pick’s wave tries other start points.
In Deckie Deckie reads the key through the song and starts a new one only when the music moves and stays there. It also reads the key at each end of the song, where the mixing happens: a song that steps up for its last chorus ends in another key.
The two songs’ speeds are too far apart to match, so getting from one to the other needs a special edit or a clean cut.
On the decks There is no single DJ word. DJs reach for a “transition track” (“starts at 92 BPM and somehow transitions to 126”), or just cut, which forum DJs call the easiest way.
Also calledtransition track(forums), transition edit(DJ pools), tempo‑change track, no beat‑match
In Deckie Where Deckie looks for the best place to hand over, measured from where the music really ends, not from silence. A short or sung outro points toward an echo out or a cut.
In Deckie Deckie lines a ruler of 8‑bar steps up with where the music actually changes, aims each transition at the start of a phrase, and checks that both songs have room for a phrase‑length blend.
In Deckie New picks with every song, best first: title, disc and folder, tempo and pitch, a wave of the transition and a line with the move. Each is ranked on tempo, key, energy, singing, phrase, sound, rhythm and style, tempo most; the number is never shown. Long‑press a pick for the reasons. Options, never a verdict.
Alsocomes in on the four, before the one, anacrusis
A sung note or two that start just before the first beat of a bar and lead into it.
On the decks Music schools say anacrusis; DJs say the vocal “comes in on the four”. It matters when you drop a vocal on the one: the drop has to land a beat early or the first word is lost.
In Deckie Written into the crate file as the first sung beat, with a pickup flag when it falls on beat 4 just before a downbeat. A line on screen such as “Vocal starts a beat before bar 9” is planned.
In Deckie The card moves to “Next” at the top; tap again to unpin. A pinned pick keeps its chosen start point. Counting pins as a signal for learning is planned.
In DeckiePlanned asked in setup, so the picks Deckie calls matchable are ones your fader can reach, with a one‑tap “Widen the beat range” during a set. Today Deckie works to ±16.
In Deckie “Your music stays on your iPad. No account. No upload. Works with no signal.” What Deckie learns about your taste is planned to be yours to see, export and delete. A planned helper that suggests song names from public music databases will be off unless you ask, and sends no audio.
In Deckie Deckie Booth names the song from your crate after a few seconds of music; the aim is within 15 seconds for most songs. Not yet measured in a loud room: a level meter helps place the iPad, and you can tap a song to set it by hand.
The last moment of the old song is thrown into a big hall sound and left to fade under the new song.
On the decks “Wash‑out” is the tutorial word. DJs describe it without a name: turn the reverb up until the mix “turns into mush”, then drop the next song into the tail.
Also calledreverb tail(forums), reverb throw, reverb out, wash‑out(tutorials), FX out
A quick scratch noise as punctuation before the next song starts.
On the decks Said as “scratch in” a song, or “scratch and cut to the next track” in hip‑hop threads: a short baby, chirp or transform scratch before the new song lands.
In DeckiePlanned without key lock a pitch change moves the key too, so Deckie will count a 6 percent change as a key move when it checks whether two songs agree.
In Deckie Deckie Booth records the set from the same microphone it listens with, beside a log of time, song, disc location, pitch and confidence. A small REC timer pauses or resumes it. The files are the DJ’s own.
A quick overlap, a few bars long, where the next song slides in and takes over.
On the decks There is no single DJ word: forum DJs say “short overlap”, “quick mix” or “fast bass swap”. “Short blend” is Deckie’s plain name for an 8‑bar blend.
Also calledfast bass swap(forums), short overlap(forums), 8‑bar mix, EQ mix
In Deckie Never fewer than 10, leaving out anything played in the last 12 and any disc switched off. Simple shows the first 5, Full the first 10; the rest wait under More, which runs on through the whole crate and has a search.
In Deckie From 0 to 100 percent. At 0 the shortlist is in score order; at 100 it is a fair shuffle; in between, the better songs tend to stay near the top. A pinned song stays first.
A sudden switch at the end of a section with no fade at all.
On the decks Heard as “slam it in” or “slam the next song in”; hip‑hop DJs say “hip hop slam”. Not “slamming the faders”, which means pushing a fader to the top for show.
Also calledhip hop slam(US hip‑hop), slam it in, drop on the one, end‑to‑end(tutorials)
In DeckiePlanned three to five songs from the DJ’s crate, then tiles for each change: blends, effect exits, cuts, and “Not sure” or “Something else” so no one has to guess. Under five minutes with the gear questions.
In Deckie A small note under the wave: “sync area in 0:37”, then “sync area · 16 bars left”. It replaced a countdown, because Deckie recommends rather than prescribes.
A few seconds of the next song’s hook are dropped in and pulled away again, so the crowd knows what is coming.
On the decks Heard as “teasing it for a bit, then finally dropped the track”. Hip‑hop DJs have a version, the “sample stab drop”: hit a sample of the next record on the downbeat, then drop it.
Also calledteasing(forums), teaser, sample stab drop(hip‑hop forums), stab(forums)
While both songs play, the speed is slowly slid from the old song’s pace to the new one’s.
On the decks Tutorials name it; DJs describe it: “build up the tempo”, or ride the pitch through a break. One tutorial goes from 104 to 126 BPM over 16 bars.
In Deckie Written as the set goes, one line per song, beside the recording. A cue sheet and a tracklist ready to paste into Mixcloud are planned exports.
In Deckie Deckie’s word for the record, never for the change between two songs. Its analysis measures each song’s start and end tempo, so it sees the change.
The song slows to a stop like a record player switched off, then the next song cuts in.
On the decks DJs say “hit the brake” or “the brake effect”. Pioneer prints VINYL BRAKE, and forum posts often spell it “Vinyl Break”.
Also calledbrake(hit the brake), brake effect, power down, tape stop(Traktor users), roll out(Serato Scratch Live, a brake‑style effect), Vinyl Break(common misspelling)
In Deckie Counted at each end of the song. Blends of 16 bars or more need that many; too few flags a short intro or outro. The crate file also says what those bars hold: beat only, a riser or pad, a fade, or singing from bar 1.
Alsothe breakdown, the instrumental section, where the vocal drops out
Eight bars or more in the middle of a song with no singing.
On the decks DJs say “the breakdown”, “the instrumental bit” or “where the vocal drops out”. Room to bring a second song in mid‑track, to loop, or to lay an acapella.