Elysia Tools
Navigation
Media
Remap audio channels to different outputs
Details
Flexible channel remapper using FFmpeg pan. Choose an output layout (stereo, quad, 5.1) and provide a pan expression (e.g., c0=FR|c1=FL to swap stereo). Useful for correcting routing, creating stems, or custom speaker layouts.
Execution
Fill in the form, run the tool, and review the result in one place.
Samples
Related
Ready for a run
Tool usage guide
The Audio Channel Mapper lets you remap audio channels to different outputs using FFmpeg's pan filter. It supports layouts like mono, stereo, quad, and 5.1, enabling precise channel routing with custom pan expressions.
Background
A podcast episode has the host's audio on the right channel and the guest's on the left, contrary to standard practice.
Problem
Listeners hear the audio reversed, which is disorienting.
How to use
Upload the audio file, select stereo output, and set the pan expression to 'c0=FR|c1=FL' to swap the channels.
Outcome
The audio is remapped with host on left and guest on right, aligning with listener expectations.
Background
An audio engineer needs to upmix a stereo music track to 5.1 surround for a film soundtrack.
Problem
The stereo file lacks the spatial distribution required for immersive surround sound.
How to use
Upload the stereo file, select 5.1 output layout, and enter a pan expression like 'c0=FL|c1=FR|c2=FC|c3=LFE|c4=SL|c5=SR' to assign channels.
c0=FL|c1=FR|c2=FC|c3=LFE|c4=SL|c5=SROutcome
You can upload any audio format supported by FFmpeg, such as MP3, WAV, AAC, or FLAC.
Pan expressions use FFmpeg syntax, like 'c0=FL|c1=FR' to map channel 0 to front left and channel 1 to front right. Refer to FFmpeg pan documentation for advanced options.
Yes, select the 5.1 output layout and define a pan expression for multi-channel mapping.
Yes, the audio file must be under 200 MB.
The default is 'c0=FL|c1=FR', which maps the first two channels to stereo left and right.
The stereo track is converted to a 5.1 surround mix with proper channel placement for front, center, LFE, and surround speakers.