MiniMax Output Paths

Batch music workflows fall apart in the filesystem. You render twenty tracks, and the FLACs land in one folder, the MP3s in another, the original archive somewhere else, and the cover art nowhere near either - and by the time you try to match "which MP3 pairs with which cover," you've invented a job that shouldn't exist. MiniMax Output Paths prevents that by computing consistent relative output prefixes for every file a song produces: original audio, release FLAC, release MP3, and artwork. One node, four prefix outputs, one shared base path.

How it works

You give it a source_name (the stable song identifier, normally the prompt filename or LLM source name) and a base_output - by default audio_minimax3/%date:yyyy-MM-dd%/, a relative path under ComfyUI's output directory where %date:yyyy-MM-dd% is expanded into a dated folder. Below that base, four subdirectory widgets split the outputs:

• original_subdir (default 32flac/) - the untouched MiniMax source archive.
• sr_flac_subdir (default 48flac/) - the final/upscaled lossless FLAC. The tooltip is worth reading: this is only a folder label; the actual sample rate comes from the audio signal entering the saver, not from the folder name.
• sr_mp3_subdir (default 48mp3/) - final/preview MP3.
• artwork_subdir (default artwork/) - cover JPGs.

There's also a variant-handling block: append_variant_index (default true) appends a run number so multiple variants of the same song don't collide, with variant_padding (default 2, so _01 rather than _1). The optional run_index and variant_count inputs feed it and the metadata.

Outputs

original_prefix, sr_flac_prefix, sr_mp3_prefix, artwork_prefix - four STRING prefixes, each built from source_name + base + subdir (+ variant suffix). Wire them into the corresponding savers: the archive saver for the original, the FLAC and MP3 savers for the release formats, and the artwork saver for the cover. Because the same base filename flows through all four, the cover embed can always be matched back to its song.

Installing it

Pack install via ComfyUI Manager (search "MiniMax Music Production Toolkit") or:

cd ComfyUI/custom_nodes
git clone https://github.com/jplenio/ComfyUI-MiniMax-Music-Production-Toolkit.git
cd ComfyUI-MiniMax-Music-Production-Toolkit
python -m pip install -r requirements.txt

Dependencies: scipy, soundfile, imageio-ffmpeg, mutagen, Pillow. Restart ComfyUI and hard-refresh once.

Gotchas

Two naming traps. First, the folder names (32flac/, 48flac/, 48mp3/) are labels, not guarantees - the sample rate is whatever the audio actually is when it reaches the saver, so don't file a 44.1 kHz master under 48flac/ and assume anything resampled itself. Second, base_output is relative to ComfyUI's output directory; if you want absolute paths, that's what the separate Save Audio Absolute Path node is for. And if append_variant_index is off with multiple variants, you've signed up for filename collisions - the default exists for a reason.