Up to 200 MB. Decoded at 48 kHz on this device. Long recordings may exceed the browser memory limit.
Narrowing can improve compatibility, but cannot recover information that cancels when summed to mono.
Stereo Repair
Reduce excessive stereo width or create a mono fold-down. Keep the original and compare the result in your browser.
How it works
Choose a recording
Open a mono or stereo audio file. Nothing is uploaded.
Adjust and listen
Set the controls, process, and compare with the original. Keep only changes that help your recording.
Save a new WAV
Download a 24-bit WAV with your plan access. Your original file is unchanged.
Frequently asked questions
What are the limits?
Narrowing can improve compatibility, but cannot recover information that cancels when summed to mono.
Does it master my song?
No. This is a focused repair step, not loudness mastering. Only output that would clip is attenuated, and that amount is shown.
Upload a track to
instantly master
Choose a file or drag it here
Supports WAV · FLAC · MP3 · M4A · AIFF
Your next release starts here