I'm used to work with the ltx director node, specially because it gives me control over the audio, i can add little clips of audio in the exact spot i want and that will guide the model to generate similar audio filling the gaps.

That's why i'm making something like ltx director for H3 FLF2V (maybe it works in the ref model idk). still very green and probably has bugs because it's totally vibecoded but it works for me.

with this you can put video images and audio anywhere in the timeline, and you can also adjust the strenght with that green line, each clip can have different levels of strenght through the timeline.

this is a fork of ComfyUI-H3-Motion-Context-MultiRef if you want to try it and give me feedback here's the link https://github.com/BSG-Walter/ComfyUI-H3-Motion-Context-Timeline

there is a H3 Timeline Example workflow.

You can't add prompts to specific parts of the timeline, but since H3 lets you indicate the exact timing for each scene within the standard prompt, I didn't feel it was necessary to add that functionality.

anyways i hope you like it