<h3 id="minimax-h3-ref2va-audio-driven-turbo-(image-+-audio-to-video)">MiniMax H3 Ref2VA — Audio-Driven Turbo (Image + Audio to Video)</h3>A ComfyUI workflow for MiniMax H3 that drives generation with your own reference audio instead of relying on the model's own invented sound. Built on H3's ref2va (reference-to-video/audio) task — the only H3 task type whose node exposes an audio-reference input — so a real audio file (dialogue for lip-sync, an SFX cue like a splash, ambience, etc.) can be handed to the model alongside a reference image and threaded into the generated clip's timing.Built entirely from stock ComfyUI core nodes — no custom node packs required.What it does- Takes a reference image and a reference audio clip, plus a text prompt, and generates a video conditioned on both via <code>MiniMaxH3ReferenceToVideo</code>.- Auto-appends a fixed audio-retention instruction to your prompt <code>&lt;Audio 1&gt;: fully_copy — &lt;Audio 1&gt; is reused 1:1 as the target video's complete final audio track</code>) via a <code>StringConcatenate</code> node, so the model is always told to preserve your audio as the literal final track rather than treating it as a loose style cue — you don't have to remember to type this yourself.- Turbo LoRA switcher: pick any turbo LoRA from a dropdown, and a <code>StringContains</code>-based logic chain reads the filename for <code>"8step"</code> or <code>"4step"</code> and automatically sets the matching step count — so the step count can't silently drift out of sync with whichever LoRA file you actually selected.- TURBO toggle: flip it off to bypass the LoRA switch entirely and fall back to the full ~20-step base ref2va model, regardless of which LoRA is selected in the dropdown.- Everything (model loading, CLIP/VAE loading, sampling, turbo logic) is packed into one collapsed subgraph with a small set of exposed widgets, so the graph stays readable at a glance instead of a wall of wired nodes.Requirements- ComfyUI with core MiniMax H3 support <code>comfy-core</code>) — no custom node packs - <code>minimax_h3_ref2va_pruned_int8_convrot.safetensors</code> (diffusion model)- <code>qwen3vl_32b_minimax_h3_nvfp4_awq.safetensors</code> (text encoder)- <code>minimax_h3_video_vae_fp16.safetensors</code> + <code>minimax_h3_audio_vae_fp32.safetensors</code> (VAEs)- Optional: one or more MiniMax H3 turbo LoRAs (filename must contain <code>4step</code> or <code>8step</code> for the auto-switcher to detect it — anything else falls back to 20-step base behavior even with TURBO on)Usage1. Load the workflow into ComfyUI.2. In Load Image, upload your reference/subject image.3. In Load Audio (splash SFX reference), upload your reference audio clip.4. Set your Resolution Selector aspect ratio and megapixels.5. Write your scene prompt describing the shot(s) and timeline — reference your inputs as <code>&lt;Picture 1&gt;</code> and <code>&lt;Audio 1&gt;</code> in the text (see the pinned note node for the subject/retention tag format this workflow expects).6. Pick a turbo LoRA from the dropdown (or leave TURBO off to skip it) and set Duration/Frame Rate as usual.7. Queue the prompt.Notes / tuning- If your output looks undercooked or noisy at low step counts, check the console for <code>lora key not loaded</code> warnings — that confirms whether the selected turbo LoRA actually applied its weights rather than silently mismatching against the ref2va checkpoint.- The audio-retention instruction is appended automatically; if you want H3 to treat your reference audio more loosely (e.g. as a rhythm/atmosphere cue rather than a literal final track), edit or remove the Audio Guidance primitive string node rather than fighting it in your own prompt text.- TURBO off is the safest fallback if a LoRA misbehaves or you're troubleshooting quality — it forces the full base step count independent of whatever's in the LoRA dropdown.- This is ref2va, not fl2va: there's no <code>first_framelast_frame</code> keyframe conditioning here, only reference image(s) + reference audio. If you need locked start/end frames, that's a different H3 task type.- H3 generations are capped at roughly 15s natively (17-frame-per-block grid at 24fps) — this workflow doesn't chain multiple generations for longer output.CreditBuilt on Comfy-Org's official MiniMax H3 ref2va template <code>MiniMaxH3ReferenceToVideo</code>), with the turbo-LoRA step-matching logic and audio-retention prompt injection added on top using stock ComfyUI logic/string nodes.

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