# Audio Channel Converter

> Stereo to mono, or mono to stereo, in one click. Pick the downmix source (L+R sum, L only, R only) and toggle auto-normalize to avoid clipping.

Canonical: https://helpers.aibrush.co/en/audio-channel-converter

## What it does

Drop an audio file. Pick a direction (stereo→mono or mono→stereo). For downmix, pick the source: sum both channels, take just the left, or take just the right. Auto-normalize scales the output so the loudest sample sits at exactly 0 dBFS — no clipping, no quiet output.

Mono→stereo simply duplicates the single channel into both. There's no spatialisation pass; output is centered.

## How to use it

1. **Drop the file** — Any common audio format.
2. **Pick direction and source** — For voice/podcast content, downmix to mono saves space. For a music track that uses one channel for vocals, pick that channel only.
3. **Process** — Auto-normalize is on by default. Turn it off if you want absolute output levels preserved.

## When to use it

### Podcast prep

Convert stereo recordings to mono — saves half the file size with no audible loss for spoken content.

### Voice memo cleanup

Bad mic placement on one channel? Pick the other channel directly.

### Mono source needs stereo output

Some publishing platforms require stereo files. Convert mono→stereo before uploading.

## FAQ

### Why does the L+R sum clip?

If both channels have a peak at the same instant, the sum can hit 2.0 — well past 0 dBFS. Auto-normalize divides by the max to keep the result within range.

### Will mono→stereo make it sound 'stereo'?

No. It just sends the same signal to both speakers. True stereo separation requires multi-track sources.