Audio Input Switch JK🐉

Video generation in ComfyUI doesn't stop at frames - the "Cuts" and talking-head workflows JakeUpgrade ships also carry audio around the graph, and occasionally you want a choice of which track goes where. Audio Input Switch JK🐉 is the switch-family node that does that: two AUDIO wires in, one boolean, the chosen clip flows out.

It landed as part of the pack's audio-aware push - the same v2.0.16 update that added Cut Audio JK, Cut Audio Index JK, and the scene-cut audio tools. If you're assembling a video from scene cuts, "use the voice-over for segment 1, the music bed for segment 2" is a routing problem, and this is a routing node.

How it works

Same core as every JK switch:

if audio_true is not None and boolean_value:
    return (audio_true, boolean_value)
else:
    return (audio_false, boolean_value)

• boolean_value - True returns the "true" audio, False the "false" one.
• audio_false - required, used when False.
• audio_true - optional, used when True; unplugged = pass-through.

Outputs: audio_output (AUDIO) and boolean.

The AUDIO type is the one the video-helper / audio-node ecosystem uses - whatever produces audio in your graph (Video Helper Suite's audio load/save, the pack's own Cut Audio nodes, Qwen-ASR output, etc.) speaks it. This switch just routes the object; it doesn't decode or resample anything, so it's cheap and safe to drop into a video assembly line.

Where you'd use it

• Toggle between a voice track and a music track for a given segment in a talking-video workflow.
• A/B two versions of a scene's audio (original vs a cut/processed take) without rebuilding the graph.
• Choose whether a segment gets audio at all - wire audio_true to a real clip and leave audio_false connected to silence/empty.

It's a niche node, honestly - you only need it if you're doing audio-in-the-graph work. But if you are, it's the difference between one toggle and a pile of cut-and-paste edits.

Install

Ships with ComfyUI-JakeUpgrade. ComfyUI Manager → search ComfyUI-JakeUpgrade, or:

cd ComfyUI/custom_nodes
git clone https://github.com/jakechai/ComfyUI-JakeUpgrade
cd ComfyUI-JakeUpgrade && pip install -r requirements.txt

No models. Menu: 🐉 JK/🔀 Switch. Same pack-level notes as the other switches: the Manager conflict warning with IPAdapter Plus is replacement-folder noise you can ignore, and if the switch menu is absent, check ENABLED_MODULES in config.ini.