Quick definitions for BPM, key matching, stems, and more.
A measure of a song's tempo — how many beats occur in one minute. When you combine songs in a mashup, their BPMs need to line up (or be adjusted to match) so the beat doesn't drift or clash. Typical tempos vary a lot by genre — house commonly runs 115–130 BPM, while hip-hop spans roughly 60–100 BPM.
See BPM ranges for more genres →The musical scale a song is built around (e.g., D major, A minor). Songs in compatible keys tend to sound harmonious when layered; songs in clashing keys can sound dissonant even if the tempo matches. G major and C major are consistently the most common keys in mainstream music, likely because they're the easiest keys to play on guitar and piano — an analysis of Spotify's catalog found G major alone accounts for roughly 1 in 10 songs.
Adjusting or selecting songs so their keys work together harmonically before combining them. Tuttii recommends a key automatically based on the songs in your project, but you can always override it.
Aligning the BPM of two or more songs so they play back at a consistent, danceable speed when combined. Like key matching, Tuttii suggests a tempo automatically, but it's fully adjustable.
A wheel-shaped visual system DJs use to quickly spot which musical keys are compatible with each other. It's a DJ-friendly relabeling of the Circle of Fifths, arranged so compatible keys sit next to each other on the wheel.
Try the interactive Camelot Wheel →An arrangement of the 12 keys where each neighbor sits a perfect fifth (7 semitones) away — and neighboring keys share all but one note. C major and G major, for example, differ by a single note (F becomes F♯). That's why keys close together on the circle mix cleanly: they're nearly the same notes.
An isolated part of a song — most commonly the vocal or the instrumental — separated out from the fully mixed track. Tuttii separates songs into vocal and instrumental stems so you can recombine pieces from different songs.
The isolated vocal track from a song, with the instrumental removed. One of the two stem types Tuttii separates every uploaded song into.
The isolated instrumental track from a song, with the vocals removed. The other of the two stem types Tuttii separates every uploaded song into.
A vocal track with no instrumental backing. DJs and producers commonly use the term for an isolated vocal stem, especially when it's the only part of a song being used.
A structural segment of a song — intro, verse, chorus, bridge, outro, etc. Tuttii automatically detects sections so you can drag in a specific piece (like just the chorus) instead of a whole stem at once.
A basic unit of musical time — a fixed number of beats grouped together, repeating throughout a song. Aligning edits to bar boundaries is what keeps a mashup sounding musically "on grid" instead of choppy.
Snapping the start and end points of a song section to bar boundaries. Keeps pieces from different songs lined up rhythmically instead of cutting in mid-beat. Tuttii bar-aligns sections automatically, with full manual override.
A new piece of music created by combining elements — most often vocals from one song and instrumental from another — from two or more existing songs. Tuttii's core purpose is helping you build mashups without needing production experience.
A reworked version of a song, produced by altering its vocals, instrumentation, arrangement, or effects into something new. "Remix" is sometimes used loosely to cover mashups and DJ edits too, but it most precisely means reworking a single song rather than combining multiple songs.
A DJ's reworked version of a single song — often rearranged, extended, or made more transition-friendly. Unlike a mashup, it doesn't combine multiple songs.
An unofficial, unreleased mashup or edit, typically shared informally within DJ/producer communities rather than commercially released.
A smooth transition between two audio elements, where one fades out as the other fades in, rather than cutting abruptly. Useful for blending sections or songs together seamlessly.
The point (or technique) where a DJ or producer moves from one song or section to another. Good transitions rely on compatible key and tempo.
Yes, but they usually need some adjustment first. Songs in incompatible keys can sound dissonant when layered directly, even if the tempo already matches. Techniques like pitch shifting and key matching bring them into harmony, often guided by a tool like the Camelot Wheel. Tuttii recommends a project key automatically based on the songs in your mashup — picking the option that needs the least manipulation for the cleanest sound — with full manual override if you want a different key.
Generally, a BPM close to one of the source songs' original tempo, so less time-stretching is needed overall — pushing a song's tempo too far from its original speed can start to sound unnatural, especially on vocals. Tuttii recommends a project BPM automatically, aiming for the option that requires the least adjustment across the songs in your mashup, but you can always set it manually.
See typical BPMs by genre →All three rework existing music, but differ in scope. A mashup combines elements — commonly vocals from one song and instrumental from another — from two or more separate songs. A remix reworks a single song's vocals, instrumentation, arrangement, or effects into something new, without pulling in another track. A DJ edit also works with just one song, rearranging or extending it to make it more transition-friendly.
The Camelot wheel is the circle of fifths relabeled with numbers and letters so DJs can mix by key without music theory. One step on the Camelot wheel is one step on the circle of fifths — neighboring keys sharing all but one note. That's the actual reason the "±1" rule sounds smooth instead of clashing.
Raising or lowering the pitch of an audio track, often used to bring a song into a different key without changing its speed.
Changing the speed of an audio track without altering its pitch. Used to bring songs to a common BPM without making vocals sound unnaturally high or low.
Mixing songs together in a way that respects musical key relationships, so the result sounds intentional rather than clashing. Key matching and the Camelot Wheel are both tools used in service of it.
A section of audio repeated continuously, often used to extend a beat, vocal phrase, or instrumental section within a project.
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Key matching, tempo matching, bar-aligned sections — Tuttii recommends the cleanest settings for your mashup and shows you a match score before you commit, with full manual control whenever you want it.