Load Audio

Worth clearing up right away, because the page title is a little misleading: despite the "KLingAI Preview Audio" slug, this node's actual display name is Load Audio, its class is LoadAudio, and it lives in ComfyUI's generic audio category rather than the pack's own KLingAI category like every other node here. It's ComfyUI's standard audio-loading node - pick a file already sitting in your ComfyUI input folder - bundled into this pack rather than something KLing-specific.

How it works and what it's actually for

It's a simple file browser: point it at an audio file already uploaded into your ComfyUI instance's input directory, and it loads that file into an AUDIO-typed value your graph can use. There's no API call, no KLing account involved, nothing generative - it's the same building block core ComfyUI and plenty of other audio-capable packs use to get a sound file into a workflow in the first place.

One thing worth flagging honestly: it doesn't wire directly into this pack's own lip-sync pipeline. Lip-Sync-Audio-Input - the node that actually feeds KLing's Lip Sync node - takes a file path or URL string, not an AUDIO-typed value, so this node's output isn't a drop-in source for that path. Where it's genuinely useful is staging or previewing an audio file for any other node in your broader ComfyUI graph that does consume the standard AUDIO type - this pack just happens to ship it alongside its own nodes.

The inputs and outputs that matter

• audio (required) - a dropdown (COMBO) listing files already present in your ComfyUI input folder. You upload or place a file there first, then it shows up here.

The single output is AUDIO - the loaded audio data, ready to connect to any node elsewhere in ComfyUI (core or another pack) that accepts the standard AUDIO type.

Installing it

It comes along with the rest of the pack - no separate install. ComfyUI Manager: search ComfyUI-KLingAI-API, install, restart. Manually:

cd ComfyUI/custom_nodes
git clone https://github.com/KwaiVGI/ComfyUI-KLingAI-API
cd ComfyUI-KLingAI-API && pip install -r requirements.txt

No API key needed for this specific node, and no dependency beyond whatever core ComfyUI already needs for audio handling.

Common issues

The most common confusion is exactly the naming mismatch above: people expect a "KLingAI Preview Audio" node to be part of the lip-sync chain, plug it in expecting it to feed Lip-Sync-Audio-Input, and find the types don't match. If you're building a lip-sync workflow, use Lip-Sync-Audio-Input with a file path or URL instead - this node is for getting audio into the rest of your graph, not into this pack's own KLing calls. Beyond that, the usual core-ComfyUI audio-loader gotcha applies: if your file doesn't show up in the audio dropdown, it isn't in the input folder ComfyUI is actually scanning, or the format isn't one ComfyUI's audio loader recognizes - check the console for an import or format error rather than assuming the node is broken.