Swap Left and Right Channel in Multiple MP3s — Bulk Audio Tool

Batch Swap Left/Right Channels — MP3 File Processor Software

What it does

• Swaps left and right stereo channels across many MP3 files in one operation, producing new files with channels flipped.

Key features

• Batch processing of folders or selected files.
• Lossless channel swap without re-encoding (when operating directly on frame-level stereo data) or fast re-encode using chosen bitrate/codecs if needed.
• Preserve original filenames (option to append suffix like “_swapped”) and metadata (ID3 tags).
• Preview function for a single file before batch run.
• Preset profiles for common workflows and command-line support for automation.
• Error handling and logging (skips corrupted files, reports failures).

Typical workflow

1. Select source folder or add files.
2. Choose output folder and filename convention.
3. Set processing options: in-place vs. write new files, keep metadata, re-encode settings.
4. Preview one file to confirm swap.
5. Run batch; view progress and final log.

Formats & compatibility

• Native MP3 support; may also accept WAV, FLAC, AAC depending on implementation.
• Runs on Windows/macOS/Linux or as a cross-platform GUI with optional CLI.

Performance & quality

• Frame-level swap is near-instant and preserves audio quality.
• Re-encoding adds processing time and may alter quality—choose same bitrate/codec to minimize loss.

Safety & backups

• Recommended to write to a new folder or enable automatic backups before in-place changes.

Use cases

• Correcting stereo channel mistakes from recording setups.
• Preparing audio for platforms with channel-specific requirements.
• Batch-fixing large music libraries or podcasts.

If you want, I can draft UI text, command-line examples, or a short spec for this software.