Song Check · Start with what you hear
Do parts of your song get quieter when it plays in mono?
A wide mix can change when the left and right channels are combined. Check for supported signs of cancellation and find the moments worth reviewing before changing your stereo sound.
Try it with your songYour original stays untouched. Every change is your choice.
Your recording. Your decision.
Check your mix for mono collapse
The local analysis opens a mono-specific summary alongside the full Quick Check. It reports what it found without assuming that wide stereo is a mistake.
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.
What does mono compatibility mean?
Stereo plays separate left and right channels. Mono combines them into one. Some differences between the channels can cancel when combined, making a part quieter or changing its tone. Compatibility means understanding that change and deciding whether it matters for your recording.
What this checker looks for
Song Check measures the stereo recording and applies its supported mono-collapse rules. If a finding is raised, you can select its region and review the evidence. A supported finding may offer a conservative preview. It does not identify every instrument, recreate missing parts, or predict every speaker.
A wider mix is not automatically a bad mix
Stereo effects are often deliberate. Keep the balance you like unless the change in mono creates a real problem for your song. An adjustment that helps mono can also narrow the stereo image, so compare both the musical result and the tradeoff before keeping it.
No finding, or an already-mono file?
If the file is already mono, there are no separate channels to test for stereo cancellation. If a stereo file receives no mono-collapse finding, that only means the supported rules did not flag one. Check important parts by ear in your music software too, especially effects and layered recordings.
There is more than one way to shape your song.
The complete Song Check workspace also includes technical review, other sound choices, and a reference comparison. You can explore these with the same file using Quick Check, Guided, or Power mode—no second upload needed inside the workspace.
Explore the complete online mix analyzer →Follow what you hear
Other listening questions
Questions before you start
Does the checker automatically narrow my song?
No. Analysis does not change the file. Any available processing preview requires your action, and you choose whether to keep it.
Can this repair every phase problem?
No. Some issues need changes to individual microphones, layers, or stereo effects in the original session. Whole-song processing has limited control.
Can a mono recording become true stereo?
This check does not invent a new stereo performance. An already-mono file is identified as such, and stereo-widening options are not offered as if it contained separate left and right information.
