Audio Channel Converter Online Free

A free audio channel converter for switching between mono and stereo. Swap left and right channels, isolate a single channel, or mix stereo down to mono — supports all popular audio formats.

How to Convert Audio Channels

1

Choose your conversion direction: Upmix (stereo → surround) or Downmix (surround → stereo/mono)

2

Upload your audio file — MP3, WAV, FLAC, OGG, AAC, AC3, and more are supported

3

The tool auto-detects the number of channels in your file

4

For upmix: select target (5.1 or 7.1), choose algorithm (Simple, Matrix, or Enhanced), and pick output format

5

For downmix: select target (Stereo or Mono) and output format

6

Click "Convert" and wait for processing to complete

7

Download your converted file

Convert between stereo and surround sound formats instantly in your browser

Drop your audio file here or browse
MP3, WAV, OGG, FLAC, AAC, M4A, M4B, WMA, AIFF, OPUS, CAF, MP4, WEBM, MOV, MKV, AVI, WMV, FLV, M4V, 3GP, TS, MTS, M2TS, VOB, MPG, MPEG, OGV ·
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Target Configuration
Upmix Algorithm how the surround channels are created
Output Format MP3 does not support more than 2 channels
Speaker Layout
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💡 How It Works
Target Configuration
Output Format
💡 How Downmixing Works
Downmixing combines multiple channels into fewer channels using standardized mixing coefficients. The center channel is distributed equally to left and right. Surround channels are mixed into the front at a reduced level (-3 dB). The LFE (subwoofer) channel is attenuated and added to the mix. This is the same algorithm used by professional audio software and hardware receivers.
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Conversion Complete!

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