Tempo and Pitch Converter
Speed a track up or slow it down and see where it lands: the semitones and cents it moves, the new key and Camelot code, and the nearest tempos that keep it in tune.
Nearby tempos that stay in tune
Resampled to one of these, the track moves by whole semitones, so it lands exactly in a key instead of between two. Click one to use it.
Will it mix with another track?
Sounds to load your MIDI into
Supersaw Essentials: 25 free trance presets for Vital, the free synth. Leads, plucks, pads and gated stabs, voiced for every tool on this site.
Resampling or time-stretching
There are two ways to change a track's tempo. Resampling plays it faster or slower, like speeding up a record: the pitch moves with the tempo. Every 6% faster is about one semitone higher. It sounds natural and keeps transients clean, which is why it's a favourite for remixes, bootlegs and hard trance edits. Time-stretching (key lock on a DJ player, warp or elastic audio in a DAW) changes the tempo but keeps the key, at the cost of some artefacts on big changes.
When you resample, the track will usually land between two keys. Small amounts (under about 20 cents) are fine; beyond that, the track sounds out of tune against anything in the original key. Use one of the nearby in-tune tempos, or retune the rest of your project to match.
DJing with the pitch fader
With key lock off, the pitch fader resamples: +6% is about a semitone up. The percentage shown here is what to set on your CDJ or controller to match the new tempo, and the Camelot code tells you which keys it now mixes with. For planning a whole set by key and tempo, use the DJ Set Planner.
Questions
How is the semitone shift worked out?
Semitones = 12 × log₂(new tempo ÷ original tempo). Going from 128 to 138 BPM is 12 × log₂(1.078) = 1.31 semitones: one semitone and 31 cents up.
What are cents?
Hundredths of a semitone. Most listeners notice a track is out of tune somewhere between 10 and 25 cents, depending on the sound.
Can I tune the rest of my remix to a resampled sample instead?
Yes. Set your DAW's master tune, or each synth's fine tune, by the cents shown here (and transpose by the semitones). Everything then sits in tune with the resampled part.