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MiniMax H3: your BGM disappears at 480p, and clip length buys it back. 10+ runs, measured.

This story is from 2026-08-20. It is preserved in the archive; the latest stories are on the live feed.

Short version: at 864x480 with dialogue in the prompt, MiniMax H3 renders no background music at all. You get the dialogue and one short sound effect, nothing else. Prompt wording doesn't fix it and neither does raising steps. Clip length does. Going from 5s to 15s at the same resolution brought th…

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  1. 2026-08-20 06:32 · r/comfyui
    MiniMax H3: your BGM disappears at 480p, and clip length buys it back. 10+ runs, measured.

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