Sample rate & bit depth
All stems should share one sample rate, for example 48 kHz, ideally at 24-bit or 32-bit float. Then everything fits together without conversion.
Free tool · runs in your browser
Stem-Check
Every stem gets checked: equal length, no heavy clipping, no empty stems and more. Green is fine, yellow is worth a look, red should be fixed before the mix.
There are no audio files in this folder. Supported: WAV, AIFF, FLAC and MP3.
Stem-Check
Result
What to do
Notes
What does Stem-Check look at?
Equal length
Export every stem from the same start point, bar 1. Then they line up in the mix automatically.
Levels & clipping
No stem should clip at full scale. Leave some headroom, peaks around −6 dBFS are ideal. No need to normalise.
Format & names
WAV, AIFF or FLAC instead of MP3, and clear names like “Lead Vocal” instead of “Audio 12”, save us both time and questions.
Common questions
Why should all stems be the same length?
If every stem is exported from bar 1, they line up automatically in the mixing session. Otherwise each one has to be placed by hand, which costs time and money.
Is 16-bit a problem?
No, it works. 24-bit or 32-bit float gives the mix more headroom. That’s why 16-bit is yellow, not red.
Is my folder uploaded?
No. Everything is checked in your browser, no file leaves your device.
How do I export my stems properly?
Step-by-step instructions for FL Studio, Ableton, Logic and Cubase are in the guide “Exporting stems”.
Next steps