Mix stereo to mono, extract a channel or swap stereo channels while preserving decoded timing.
Your input
Outputs are cleared when the input changes.
Result
Enter your data or use the example, then run the tool.
Worked example
The generated stereo example has opposite-phase channels. Averaging them to mono produces silence (within PCM quantization); extracting left retains its tone.
Method
Mono averages two PCM channels sample by sample; left/right copies one channel; swap exchanges channel order. A mono source supports mono/left only. Frame count and decoded sample rate are unchanged before PCM16 WAV quantization.
Limits
One file up to 50 MiB; decoded mono/stereo up to five minutes and 28.8 million samples across channels. Only browser-decodable formats. Decoding may resample; output PCM16 WAV is quantized, not a lossless copy of the compressed stream. Native decode cannot be forcibly interrupted; cancellation ends the wait and cleans resources when possible. Not voice enhancement, karaoke or vocal/instrument separation; opposite-phase content can disappear.
Your inputs stay on this device. Only optional, consented page visits are measured. Input values, files, filenames and processing logs are not sent to Analytics.
When switching languages, text, settings and selected files are temporarily kept on this device. Transfers are removed after restoring; interrupted transfers are cleaned up on a later visit. Inputs and files are never uploaded.