Song Check · Online mix analyzer
Check your song. Find what sounds off. Try a different sound.
You know the sound you are looking for. Song Check helps you explore how to get there: review measured issues, tell us what sounds off, and keep only changes you like.
Check your mixYour original stays untouched. Every change is your choice.
Your recording. Your decision.
Start your Song Check
Choose your song for a free local mix analysis. Start with Quick Check, then explore optional sound changes without uploading the file again.
Free local scan and sound previews. Optional cloud stem separation is priced separately before you run it.
Choose your recording
The scan runs locally. Keep this tab open while it works.
Listen and compare
Review findings or try the sound option that brought you here.
Keep what you prefer
Accept changes explicitly, check the export, and download—or keep your original.
An online mix analyzer with a next step
Song Check measures your recording and turns supported findings into moments you can review. It checks areas such as clipped peaks, loudness, tonal changes, and stereo-to-mono compatibility. A finding explains what was measured and what the check cannot establish. Some findings offer a preview; others offer listening guidance.
Nothing flagged, but something still sounds off?
Technical checks cannot choose your taste. You can still ask for clearer detail, softer high sounds, more noticeable bass, harder-hitting beats, or a different stereo spread where supported. These are optional creative choices, not proof that the original is wrong.
Compare before you commit
Listen to the original and the preview, save a choice only if you prefer it, and undo it if you change your mind. The final download is rendered from your accepted choices and checked again. You can export a WAV and a plain-English receipt, or keep the original file.
A whole song or one part of it
Start with a complete mix or master. If only the singing or drums need attention, Guided mode can work with an aligned stem you already have. Optional paid stem separation is a separate choice with its price shown before you run it. Opening this tool never starts a paid job.
Follow what you hear
Start with the part that sounds off
Does everything in your song seem to blend together?
Try a clearer version of your mix
Explore this sound →Does your song sound like it is playing through a blanket?
Hear whether more detail helps your song
Explore this sound →Do parts of your song get quieter when it plays in mono?
Check your mix for mono collapse
Explore this sound →Questions before you start
Is this mix checker free?
The local scan and browser-based sound previews are free. Optional cloud stem separation uses credits and requires a separate explicit action. You do not need to buy separation to check your mix.
Does Song Check upload my recording?
The initial analysis and local previews run in your browser. Your file is sent for cloud processing only if you explicitly choose a separate feature such as paid stem separation. Keep your original and download your results before closing the workspace; the local session is not a saved cloud project.
Can it tell me whether my song is ready to release?
It can flag supported technical issues and help you compare changes. It cannot guarantee release quality, judge every musical decision, or clear copyright. An unflagged scan does not prove that a song is problem-free.
Is this automatic mastering?
No. You choose which changes to preview and keep. Song Check is a guided review and editing workspace. Selekt also has a separate mastering tool if you want a loudness-focused workflow.
