Nightcore

Nightcore is a style of edit rather than a style of composition: an existing track — originally a trance or Eurodance song — sped up by roughly 25–35% so that tempo and pitch rise together, pushing a 130 BPM club track up to around 160–180 BPM and turning the vocal into a bright, chipmunk-like soprano. The name comes from a Norwegian DJ duo active in the early 2000s; the format spread on YouTube with anime artwork, and in the early 2020s it returned as the "sped-up version" that record labels now release officially.

This guide covers where nightcore came from, how the edit works acoustically, its offshoots and opposites (daycore, slowed + reverb, chopped and screwed), its influence on hyperpop, and why it confuses audio classifiers. Curious what a sped-up edit reads as? Drop a clip into our free AI music genre detector.

A nightcore edit takes a finished recording and plays it back faster without correcting the pitch — exactly what happens when a 33⅓ rpm record is played at 45 rpm. Because speed and pitch are coupled, everything moves up at once: the beat gets faster, the vocal climbs by four or five semitones, the bass loses weight, and the whole mix sounds brighter and more frantic. Nothing new is composed; the creative act is choosing the source track and the amount of speed-up, and — on YouTube — choosing the picture that goes with it.

The classic source material is uplifting dance music: Eurodance, vocal trance, happy hardcore-adjacent pop. These already sit at 130–140 BPM with a high female vocal and major-key synth riffs, so the speed-up exaggerates traits they already have. Later uploaders applied the treatment to everything — pop, rock, K-pop, rap, metal — and long-time fans tended to regard those non-dance edits as a different, lesser thing.

Nightcore is defined by a single transformation, which makes it unusual on a genre list. It has a sound — high, fast, compressed, euphoric — but no instrumentation, harmony or structure of its own; all of that belongs to the source. The closest relatives are other edit-based styles: chopped and screwed from Houston, which does the opposite and slows tracks down, and the internet-era slowed + reverb edit. On the production side, its exaggerated pitch and speed fed directly into hyperpop.

The name comes from Nightcore, a duo of two Norwegian school friends, Thomas S. Nilsen and Steffen Ojala Søderholm, who performed as DJ TNT and DJ SOS. They started the project around 2001, first as a school project. Their inspiration was the pitched-up vocals on Scooter's hardcore remixes, and their template was simple: take a trance or Eurodance track and speed it up by about a quarter to a third, landing around 160–180 BPM. They made several albums of such edits, beginning with Energized (2002), and passed them around friends and local DJs.

The duo's tracks escaped onto file-sharing networks such as LimeWire around 2003 and onto YouTube from 2006. At the end of the decade, YouTube uploaders realised that anyone with basic audio software could make edits in the same style, and the original duo's name turned into a generic label. The typical nightcore video took shape: a sped-up song, a still image of an anime character, sometimes the lyrics on screen. The association with anime and otaku culture has stuck ever since, and so has the association with rhythm-game communities.

The 2010s turned a meme into an influence. One of the first viral nightcore videos was a sped-up "Rockefeller Street", Getter Jaani's song for Estonia at the 2011 Eurovision Song Contest. Edits moved onto SoundCloud, where club producers began to treat nightcore as a sound to borrow rather than a joke. PC Music founders A. G. Cook and Danny L Harle have cited it as an influence, and its high-pitched, hyper-bright vocal processing became one of the ingredients of hyperpop later in the decade — alongside Eurodance, trance synths and bubblegum pop.

The 2020s brought the sped-up revival. On TikTok, short clips of accelerated songs became a standard way to soundtrack a video, and a sped-up chorus could make an older track trend. Record labels responded by releasing official sped-up versions of new singles, often alongside slowed versions, on streaming services. Much of this is no longer called nightcore — the anime aesthetic and the trance canon are gone — but the transformation is identical, and the vocabulary ("sped up", "slowed + reverb") now appears in release titles on major-label catalogues.

What a nightcore edit does to a track:

• Speed-up: typically 25–35%. The original duo worked at around 25–30%; many online edits go further.
• Tempo: a 128–140 BPM dance track becomes roughly 160–190 BPM; a 100 BPM pop song lands around 125–135 BPM.
• Pitch: rises with speed — about +4 semitones at 25% and just over +5 at 35%. A song in A minor ends up somewhere around C♯ to D minor.
• Vocal timbre: formants shift up with the pitch, so the singer sounds younger, thinner and brighter — the defining "chipmunk" quality. This is the difference from a properly pitch-corrected remix.
• Bass: the sub-bass moves up by the same four or five semitones into a less weighty register; kicks lose some thump and gain click.
• Duration: shortened by the same ratio, so a four-minute song runs about three minutes.
• Extras: some edits add a harder kick, a hardcore-style drum loop or a reverb tail, but the purist form is speed-up only.

How the speed-up maps onto tempo and pitch:

Nightcore has a family of edit-based styles around it, each defined by what is done to the playback rather than by what was composed:

• Sped-up versions — the 2020s mainstream form: the same transformation, released officially by labels and used on TikTok, usually without the anime visuals.
• Daycore — the mirror image: a track slowed down and pitched down, giving a sleepy, heavy, melancholy feel. The name is a direct play on nightcore.
• Slowed + reverb — a slowed edit soaked in long reverb, popular on YouTube from the late 2010s for late-night, nostalgic listening; it overlaps with vaporwave's slowed samples.
• Chopped and screwed — DJ Screw's Houston technique from the early 1990s: heavily slowed hip-hop with skipped beats, repeated phrases and record-scratch "chops". It is a performance and mixing tradition, not just a playback change; see chopped and screwed.
• Happy hardcore — not an edit but a composed genre at 160–180 BPM with pitched-up vocals and piano stabs; nightcore sounds similar, which is no accident, since the 45 rpm trick was common in that scene.

Because nightcore is made of other people's records, it has fewer "key artists" than most genres. The touchstones are:

• Nightcore (DJ TNT and DJ SOS) — the Norwegian duo and their early-2000s albums, beginning with Energized (2002); only part of their output ever surfaced online.
• Early YouTube uploaders — channels that reposted the duo's tracks in the late 2000s and then started making their own edits, establishing the anime-thumbnail format.
• "Rockefeller Street" — the Getter Jaani Eurovision song whose sped-up version became one of the format's first viral hits.
• Scooter — not nightcore, but the German group's pitched-up hardcore remixes were the duo's stated inspiration.
• PC Music and hyperpop — A. G. Cook and Danny L Harle cited nightcore as an influence; the high, processed vocals of hyperpop and later digicore are its closest composed descendants. Our blog explains what hyperpop is and how digicore grew from it.
• Official sped-up releases — from the early 2020s, major-label singles routinely ship with a "sped up" version alongside the original, which is nightcore in all but name.

Nightcore borrows its source material from Eurodance and trance, shares its tempo and vocal range with happy hardcore, and handed its pitched-up aesthetic to hyperpop. The difference in each case is authorship. Eurodance and trance are composed and produced at their native speed. Happy hardcore is written at 160–180 BPM with its high vocals designed in. Hyperpop is original music that uses pitch-shifted, heavily processed vocals deliberately, alongside distorted bass and abrupt structure. A nightcore edit is a playback transformation of an existing record — if you slow it back down by the same ratio, you get the original exactly.

That gives a simple listening test: in a nightcore edit, everything is shifted, including the drums, the reverb and the breaths. In hyperpop, the vocal may be pitched up, but the drums and bass are produced at the song's real tempo and often hit very hard in the low end, which a sped-up record cannot do. Read our guide to internet microgenres for how these styles fit into the wider online landscape.

For a genre classifier, nightcore is a stress test. The model hears the source track's instrumentation and arrangement — trance synths, a four-on-the-floor kick, a pop chorus — but shifted into an unusual tempo and spectral range. Most of the cues that identify the original genre survive the speed-up, so the most likely answer is the source genre, not "nightcore".

What changes are the signals that push the answer sideways: a tempo of 170–190 BPM is typical of drum and bass and hardcore styles, and the thinner, brighter spectrum with an unusually high vocal can resemble hyperpop or J-pop. Try an original and its sped-up version back to back in the Genre AI music genre detector to see how much of the answer moves.

What is nightcore?

Why are nightcore videos always anime?

Is nightcore the same as sped-up songs?

What is daycore?

How is nightcore different from hyperpop?

How do you make a nightcore edit?