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ENTRIDPL

Stereo / Mono & Differential Mixer

Convert between stereo/mono, swap channels, create L−R differentials, or encode/decode Mid/Side with limiter safety.

Mode

Averages left/right (0.5/0.5) to keep level stable.

Prevent clipping
Output format
Choose container + codec. WAV/FLAC stay lossless; MP3/M4A are compressed.
WAV bit depth
About this tool

Built for editors and engineers who need quick channel routing without opening a DAW.

  • Convert stereo to mono safely or duplicate mono to stereo for compatibility.
  • Create L−R or R−L differential tracks to inspect phase issues.
  • Encode or decode Mid/Side with optional limiter to avoid clipping.
  • Pick lossless (WAV/FLAC) or compressed (MP3/M4A) outputs with presets.

Processed transiently; files are removed after download.

FAQ
Which mode should I choose?

Stereo→Mono averages L/R. Differential highlights phase differences. Mid/Side encode keeps L+R and L−R as two channels; decode reverses it.

How does clipping prevention work?

After pan math, a soft limiter (~−0.2 dBTP) catches peaks. Turn off if you need untouched math and handle gain yourself.

Which output format is best?

Use WAV/FLAC for further editing, MP3 for compatibility, M4A (AAC) for efficient small files.

Will stereo→mono change loudness?

We average L and R (0.5/0.5) to avoid boosting. If your source is already mono, it will stay the same level.

What is Mid/Side encoding?

Mid = (L+R)/2, Side = (L−R)/2. Encoding stores them as stereo; decoding restores Left/Right.

Can I upload video files?

Yes. The first audio stream is processed; video is discarded.

About

This mixer handles practical channel math without opening a DAW. Convert stereo to mono (safe 0.5/0.5 sum), duplicate mono to stereo, solo left/right, or swap channels instantly. It’s handy for podcast routing, broadcast QA and testing channel integrity.

Differential modes (L−R, R−L) reveal phase issues, while Mid/Side modes help with mastering or decoding M/S microphone pairs. An optional limiter after the pan graph prevents clipping if sums create peaks.

Choose a suitable output: WAV/FLAC for lossless workflows, MP3 with VBR presets for compatibility, or M4A (AAC) with bitrate presets for compact delivery. Video uploads are fine—the first audio stream is processed and video is discarded.

FAQ

›Why average L/R for stereo to mono?
0.5+0.5 keeps level similar to the original without boosting. It reduces the risk of clipping when L and R are in phase.
›What do differential modes do?
They subtract one channel from the other to expose phase/width differences, useful for QC and noise cancellation checks.
›How does Mid/Side work here?
Encode outputs Mid on left and Side on right; decode reverses that. Both use 0.5 gain on sums/differences to reduce peaks.
›Do you prevent clipping?
If enabled, a soft limiter around −0.2 dBTP is added after the pan filter. You can disable it if you prefer raw math.
›Which output should I choose?
WAV/FLAC for lossless edits, MP3 for widest playback, M4A (AAC) for efficient small files.

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