Everything here is free and stays free — the format spec, the nodes, the workflows, the cartridges, the LoRAs. If it saved you a night of debugging (it contains several hundred of mine), tips keep the 5090 warm:<ul><li>☕ <a target="_blank" rel="ugc" href="https://ko-fi.com/joeygambino">Buy me a coffee on Ko-fi</a></li><li>💛 <a target="_blank" rel="ugc" href="https://github.com/sponsors/jlucasmcrell">Sponsor on GitHub</a></li><li>🔁 <a target="_blank" rel="ugc" href="https://liberapay.com/joeygambino">Liberapay</a> (recurring)</li><li>⚡ Or right here: the Civitai tip button on this page sends Buzz directly.</li></ul><h3 id="v2.0-is-here-riftcast:-characters-are-files-now.-design-a-human-from-dropdowns-watch-them-audition-and-get-a-portable-character-file-anyone-can-reuse-zero-training.-plus-the-24fps-accent-discovery-that-fixes-every-&quot;why-is-she-suddenly-british&quot;-bug.-full-story-in-the-v2.0-version-notes.">🚨 v2.0 IS HERE — RIFTCAST: CHARACTERS ARE FILES NOW. Design a human from dropdowns, watch them audition, and get a portable character file anyone can reuse — zero training. Plus the 24fps accent discovery that fixes every "why is she suddenly British" bug. Full story in the v2.0 version notes. 🚨</h3><hr /><h1 id="joyai-echo-multishot-the-character-video-studio-for-ltx-2.3">JoyAI-Echo Multishot — the character video studio for LTX-2.3</h1>One character. Any number of shots. Same face, same voice, every time — and as of 2.0, your characters are files you can share.This is a complete local pipeline for character-driven video on LTX-2.3's joint audio-video model: it generates the picture AND the voice in one diffusion pass — no TTS chain, no lip-sync post, no per-word API costs. A cross-shot memory bank keeps identity and voice locked across an entire multi-shot production, and a set of hard-won fixes makes the base model behave in ways stock workflows can't.<h2 id="riftcast-characters-are-files-now">RiftCast — characters are files now</h2>Things come through the Rift. Now characters do too.A <code>.riftcast</code> cartridge is one file carrying a character's voice (a 4-second anchor clip), face (reference stills), canonical description, and optionally their LoRAs and home environments. Drop it in <code>input/riftcast/</code>, restart, and mention the character in any script: they render with their face and their voice, in any scene, zero training. Cartridges extend the roleplay world's Character Card V3/CHARX lineage into photoreal video — a cartridge can carry a chat persona too, so the same character works in your roleplay client.Three ways to get one:<ul><li>Download — <code>WREN.riftcast</code> ships in this package; more on the <a target="_blank" rel="ugc" href="https://huggingface.co/joeygambino/joyai-echo-multishot-workflow">HuggingFace repo</a>.</li><li>Cut one from any render you like — one command: <code>python riftcast.py cut &lt;master.mp4&gt; &lt;NAME&gt; &lt;dna.txt&gt;</code>.</li><li>Design one from scratch — the bundled RiftCast Studio workflow is a full character creator. A Character Designer node covers identity (gender, age, ethnicity, skin, height, build, voice timbre, accent) and a Style + Wardrobe node covers appearance: 71 styles across 10 families, plus hair colour, hair shape, makeup, accessories, demeanor and a freeform wardrobe override. Queue it and the character records an audition tape; the Packer cuts their anchor and reference stills from that render and installs the cartridge automatically. Don't like who showed up? Re-queue with a new seed. Like them? They're a file, forever. (Our test reviewer rated a Designer character's lip sync "Real — very high confidence.")</li></ul>One workflow, one switch: RiftCast Studio routes between your prompt files (LPFF/JSON batch rendering, the classic path) and the Character Designer with a single dropdown.<h2 id="the-style-dropdown-never-sends-its-own-name">The style dropdown never sends its own name</h2>This is the part that makes it work rather than being a word list. "Goth" and "preppy" mean nothing to a video model, so no style label is ever written into a prompt. Each of the 71 entries expands into concrete renderable descriptors — garments named with material and condition, hair shape, makeup with placement, worn objects, and a demeanor that drives how the character physically carries themselves on camera. Picking one goth entry produces, in part:<blockquote>"...hair backcombed high at the crown with a straight fringe cut level with the eyebrows, wearing a long-sleeved black velvet dress with a frayed hem over laddered fishnet tights, and buckled boots scuffed grey at the toe, matte pale foundation, black liner drawn thick and winged past the outer corner..."</blockquote>Hair colour stays its own dropdown and styles specify only shape, so the two can never collide. Every style carries both a masculine and a feminine wardrobe reading, so it works across presentations instead of being gender-locked, and anything you set explicitly overrides the style's contribution.<h2 id="the-24-fps-law-why-your-accents-broke">The 24 fps law — why your accents broke</h2>The single most important thing this package knows: LTX-2.3's joint audio-video prior is 24 fps-native, and render fps is a hidden accent dial. At 25 fps the same prompt and seed render non-rhotic southern British; at 30 fps, broad Australian — and off-24 fps overrides accent wording in your prompt entirely. Verified by A/B with blind phonetic review. Everything here defaults to 24 and warns when you stray. If you want a British or Australian character, render their scenes at 25/30 — it beats any wording. (Pairs with the <a target="_blank" rel="ugc" href="https://huggingface.co/joeygambino/ltx23-accent-american-audio-lora">American-accent audio LoRA</a>, which makes accent wording enforceable in the young-voice registers the base model ignores.)<h2 id="the-rest-of-the-studio">The rest of the studio</h2><ul><li>Cross-shot memory bank — identity and voice persist across shots; anchor+latest policy stops drift snowballs.</li><li>Voice casting — drop a clip in <code>joyecho_voices/&lt;tag&gt;/</code> and that character speaks with that voice in every render. Script-pinned voices via <code>voice_refs</code>.</li><li>Finishing — AutoFinish builds your master automatically; deterministic upscale; optional <code>temporal_upscale</code> doubles motion to ~48 fps masters (24 fps render law preserved, audio untouched).</li><li>Long takes — up to 1441 frames (60 s) single-shot; the old ~10 s lip-sync cliff is fixed at the RoPE-clock level (Bug fix #0).</li><li>Correctness — a full sampler-path audit (seeded hires, cache keyed on checkpoint, cloned banks), fp8/INT8/GGUF loading paths, and widget values that survive updates (saved by name, not position).</li></ul><h2 id="hardware">Hardware</h2>Built and tested on RTX 5090/3090. GGUF DiT + the <a target="_blank" rel="ugc" href="https://huggingface.co/joeygambino/ltx23-gguf-vae-companion">9 GB VAE companion</a> runs the whole stack in ~11 GB system RAM instead of ~60.Everything is also on <a target="_blank" rel="ugc" href="https://github.com/jlucasmcrell/joyai-echo-multishot-patch">GitHub</a> and <a target="_blank" rel="ugc" href="https://huggingface.co/joeygambino">HuggingFace</a> — node pack, format spec, LoRAs (<a target="_blank" rel="ugc" href="https://huggingface.co/joeygambino/ltx23-surfaces-realism-lora">surface realism</a> too), quants, and demo cartridges. LTX-2 Community License.

JoyAI-Echo Multishot Workflow - one character, many shots, same face + voice

<pre><code># v1.6 — Voice casting: your characters' voices are files now

The memory bank keeps a voice *consistent* — but shot 1 always rolled the voice from text, and whatever it rolled, the bank faithfully kept. v1.6 makes the voice a **casting decision**:

**Folder casting.** Drop a clip of your character speaking (4+ seconds, mp4 or wav) into `ComfyUI/input/joyecho_voices/&lt;speaker-tag&gt;/`. Every script whose speaker tag matches that folder gets the voice seeded into the memory bank *before shot 1* — the first shot **continues** your cast voice instead of auditioning a new one, and the same file gives you the same voice in every future render. Replace the file to recast. No widgets, no per-run setup.

**Script-carried casting.** Add `"voice_refs": {"Alice": "path/to/clip.mp4"}` to your script JSON to pin a specific take per character (overrides the folder).

**Audio-only anchors.** A bare wav works — it pairs with the character's ref image from `joyecho_refs/&lt;tag&gt;/` automatically.

**Speaker order derives from your script.** An explicit `"speakers": [...]` array, or just writing `Alice is talking, saying, "..."` in each shot. It travels inside the conditioning (and its cache), so it can't go stale or leak between graphs. The `speaker_order` widget is now only a manual override.

**Anchor + latest.** A speaker's audio context is their anchor plus their most recent shot — one drifted shot can no longer snowball into owning the rest of the video.

**Two-character tip that saves a night:** a2v cross-attention has no spatial addressing — audio at time *t* drives *every* face in frame, no matter how small or distant. Stage **one face per shot** (shot-reverse-shot) and describe only the visible character in that shot's prompt.

## Fixes (from a full sampler-path audit)

- **Hires refine now respects your seed.** Its re-noise was seeded from a hardcoded constant — every render's refine detail layer was identical regardless of seed, since the feature shipped.
- **Chained SingleShot graphs no longer condition on the previous queue run's output** (the memory bank was mutated in place through ComfyUI's node cache; incoming banks are now cloned).
- **Conditioning disk cache is keyed on the checkpoint** — swapping models can't serve you the old model's conditioning. Existing cache entries rebuild once on first render.
- Cold-start fix: a speaker's first line no longer generates against a silenced bank when per-character memory is active.

## Upgrading

Unzip over your existing `ComfyUI_JoyAI_Echo_GGUF_Nodes` folder (or replace `nodes.py`, `joyecho_script_picker.py`, `joyecho_prompt_source.py`, and `libs/ltx_distillation/inference/memory_multishot.py`), restart ComfyUI. Existing workflows run unchanged — every new feature activates from your script files or folders, not from graph edits.
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