Click Track

Generate a metronome click as audio — set a tempo and meter, or build the click from labels.

Click Track · screenshot coming soon

What this node does

Click Track produces a metronome. Give it a tempo, a time signature and a number of bars, and it renders a click audio track (accented downbeat, plain off-beats) through the same SoundFont synthesizer the rest of the music lane uses. Optionally, wire in a labels text input to place the clicks at specific labelled points instead of on a fixed grid.

Press ▶ Run to render on the backend. The node emits two outputs: the audio click track, and a performance payload describing the clicks — the same kind of performance Score Synth and other stages consume, so the click can double as a timing reference for other renders.

When to use it

• You need a metronome track to record or align against.
• You want a count-in or timing bed at a specific BPM and meter.
• You have timing labels and want clicks placed at exactly those points.

Parameters

bpm

Tempo in beats per minute, 20–400 (default 120), in 0.5 steps. Ignored when a labels input drives the clicks instead.

beats_per_bar

Beats per bar (the top of the time signature), 1–12 (default 4). The first beat of each bar is accented.

bars

How many bars to generate, 1–256 (default 8).

soundfont

Optional SoundFont file name from the resource library used to voice the click. If blank (or not found), the synth’s built-in click voices are used.

labels (optional input)

An optional text input, type COMFYTV_TEXT. When present, the click track is built from these labels (clicks land at the labelled positions) instead of from bpm/beats_per_bar/bars.

Outputs

Output	Type	Meaning
audio	COMFYTV_AUDIO	The rendered metronome click track
performance	COMFYTV_TEXT	The click performance (JSON), reusable as a timing reference

Tips

• Leave labels unwired for a plain grid click; wire it when you need clicks at irregular, labelled points.
• The performance output can be fed to Score Synth or used to line up other stages to the same grid.
• Add a SoundFont only if you want a specific click sound; the default works out of the box.

Related nodes

• Score Synth — can render the click performance, and shares its synth.
• Score Performer — produces musical performances the same way.
• Bridge — convert COMFYTV_AUDIO to/from native ComfyUI audio. See https://github.com/jtydhr88/ComfyTV/blob/main/docs/bridges.md