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PREPARE YOUR NEXT SAMPLE
A promising sample may arrive in a different key or at the wrong pace. Prepare its pitch and tempo for your project, then bring the exported audio into your music editor.
Best for an already-trimmed sample with a steady beat. Upload one audio file up to 5 minutes and 100 MB. Beat alignment, chopping and mixing stay in your music editor.
The audio tool opens on the Pitch Tempo home page.
Start with the project’s target BPM and key, then check the sample’s original values. On the Pitch Tempo home page, set tempo percentage = target BPM ÷ source BPM × 100 and choose the semitone shift from the source key to the target key. Preview and export the audio, then align it with your beat in your music editor.
This prepares one file at a time. Matching the BPM and key names is a useful starting point; the sample must still fit your arrangement’s timing, chords and musical feel. The service does not listen to a second track or automatically mix the two together.
A sample pack may already label a loop’s key and BPM. Treat those labels as a starting point and listen for whether the loop actually fits that pulse. If the values are unknown, upload the sample and choose Find pitch / tempo to obtain estimates before opening the change controls.
Use the tempo and harmonic context you have chosen in your project as the target. A very short one-shot, an unpitched drum sound or an ambient texture may not have a meaningful musical key or a stable BPM. Do not force both numbers onto every sound simply because the controls are available.
A trimmed loop with a steady beat is the most straightforward input. If your source is part of a longer recording, prepare the excerpt in your music editor first: Pitch Tempo applies its settings to the whole file and does not cut a loop out of a song.
Divide the project BPM by the sample BPM and multiply by 100. The result is the percentage to enter in the Tempo field. Keep pitch at 0 semitones when you want only this timing change.
| Sample BPM | Project BPM | Tempo setting |
|---|---|---|
| 100 | 120 | 120% |
| 120 | 90 | 75% |
| 128 | 100 | 78.125% — enter 78.13% |
Available settings run from 50% to 150%. If the calculation falls outside that range, the requested conversion cannot be applied directly here. Rounded settings and estimated source BPM can produce small timing differences, so check the result against the project grid.
Use the same interpretation of the pulse for both values. A half-time reading of a sample can make the calculated change appear much larger than necessary. Listen to the beat before committing to a large stretch.
Count the semitone distance from the sample’s tonic to the target tonic. For example, a sample in A minor can be shifted +3 semitones to C minor. The same target pitch class can sometimes be reached in either direction, but the octave and sound will differ; a small shift is often a useful first comparison.
Transposition moves all notes by the same interval. It preserves a major or minor pattern, so moving A minor up three semitones gives C minor, not C major. A matching key label also does not guarantee matching chords: a sample may contain notes or a chord progression that clash with a particular part of your arrangement.
If the sample is already at the right BPM, leave tempo at 100% and change only pitch. If it is already in the right key, keep pitch at 0. For a purely rhythmic, unpitched drum loop, a key shift may be unnecessary and can change the character of the drums.
Assume a steady sample is 100 BPM in A minor and your project is 120 BPM in C minor. Enter 120% tempo and +3 semitones. These are separate adjustments: increasing tempo alone will not perform the key change.
A correctly trimmed four-bar 4/4 loop at 100 BPM lasts 9.6 seconds. At 120%, its expected musical duration becomes 8 seconds, matching four bars at 120 BPM. That example assumes exactly four bars with no added leading silence or reverb tail. File boundaries and encoder padding still need checking in your editor.
Open the audio preparation workspace, upload the source, choose Change pitch / tempo and enter the two settings. Request Listen preview to check the processed sound. The preview covers the opening 20 source seconds, or the complete file when it is shorter.
Select Download full track and choose a supported format. WAV is a practical choice for further editing because it avoids an additional lossy encoding stage. Exporting a compressed source to WAV does not restore lost detail.
Import the downloaded file into your music editor and align its first intended beat with the project. Equal BPM values do not remove leading silence or place the sample on the correct downbeat for you.
Listen against your drums or metronome across several bars. A constant offset may need a position adjustment; increasing drift may point to a BPM estimate, rounding or source-timing problem. Avoid unintentionally stretching the already-converted file a second time during import.
Check the sample with the bass and chords it will accompany. If it clashes despite a matching key name, a different sample, musical arrangement or more detailed editing may be needed.
You can compare multiple opening previews before exporting. After the full export finishes, a different version requires a new chat and another upload of the original. That counts as a new upload under the guest or account allowance.
A single tempo percentage scales the timing already in the source. It does not correct changing tempo, swing or individual hits. Detailed beat-by-beat alignment needs a music editor with timing markers or chopping tools.
The workflow processes one uploaded audio file per chat. You supply the project’s target values. There is no two-track comparison, automatic mashup or mixing engine.
Yes, an existing readable vocal file can be adjusted. The service does not extract vocals from a mixed song, and a singer’s phrasing still needs to be aligned with your arrangement after export.
Pitch and tempo adjustments can affect the texture of transients and sustained notes, particularly at large settings. There is no individual-note correction, chord rewriting, loudness matching or automatic mix balancing. Listen to the result in context.
Use a source no larger than 100 MB and no longer than 5 minutes. Guests can begin 3 chats per 24 hours; free accounts allow 5 per hour. Server audio expires from the original upload after 24 hours for guests or 7 days for accounts. See supported formats and file availability, and save the export you need for your project.
Bring the source audio and your project’s target key and BPM. Prepare a version on the home page, then check its timing and harmony in your arrangement.