> ## Documentation Index
> Fetch the complete documentation index at: https://comfytv.org/llms.txt
> Use this file to discover all available pages before exploring further.
# Audio Visualize
> Render a track as a picture — waveform or spectrogram, in a quick FFmpeg style or a higher-detail "pro" render.
## What this node does
**Audio Visualize** turns an audio track into a still image. Two fast modes use FFmpeg (`showwavespic`, `showspectrumpic`); two **pro** modes use ComfyTV's own higher-detail waveform and spectrogram renderers with metering overlays. It does not change the audio.
It takes a `COMFYTV_AUDIO` snapshot (or a `COMFYTV_VIDEO`, whose audio track is used) and outputs a `COMFYTV_IMAGE`. It has a ▶ **Run**. A source is required.
To feed native ComfyUI `AUDIO` in, insert a **Bridge** — see [bridges.md](https://github.com/jtydhr88/ComfyTV/blob/main/docs/bridges.md).
## When to use it
* Generate a waveform thumbnail for a clip in a storyboard or export.
* Inspect the spectral content of a track (find hiss, hum, or tonal balance).
* Produce a labeled "pro" spectrogram or metered waveform for analysis.
## Parameters
### mode
Which render. Options: `waveform` (default), `spectrum`, `waveform_pro`, `spectrum_pro`.
### width / height
Output image size in pixels. **width** **240–4096** (default **1200**), **height** **120–2048** (default **480**).
### Waveform (fast) — `split_channels`
Boolean, default **off**. When on, draws each channel in its own lane instead of overlaid. Used by `waveform` mode.
### Spectrum (fast) — `color`, `legend`
* **color** — the spectrogram color map: `intensity` (default), `channel`, `rainbow`, `moreland`, `nebulae`, `fire`, `fiery`, `fruit`, `cool`, `magma`, `green`, `viridis`, `plasma`, `cividis`, `terrain`.
* **legend** — Boolean, default **on**; draws frequency/time axis labels. Used by `spectrum` mode.
### Pro spectrogram — `pro_scale`, `pro_colormap`, `range_db`, `gain_db`, `freq_gain`
* **pro\_scale** — frequency scale: `log` (default), `linear`, `mel`.
* **pro\_colormap** — `roseus` (default) or `gray`.
* **range\_db** — dynamic range shown, **20–120 dB** (default **80**).
* **gain\_db** — brightness/gain, **0–60 dB** (default **20**).
* **freq\_gain** — frequency-tilt gain, **-10 to +10 dB/oct** (default **0**). Used by `spectrum_pro` mode.
### Pro waveform — `show_rms`, `show_clipping`, `db_axis`
* **show\_rms** — Boolean, default **on**; overlay RMS envelope.
* **show\_clipping** — Boolean, default **on**; highlight clipped samples.
* **db\_axis** — Boolean, default **off**; label the amplitude axis in dB. Used by `waveform_pro` mode.
## Outputs
| Output | Type | Meaning |
| --------- | --------------- | ----------------------------------------- |
| **image** | `COMFYTV_IMAGE` | The rendered waveform/spectrogram picture |
## Tips
* Use the fast modes for quick thumbnails; the **pro** modes for readable, metered analysis images.
* Only the parameter group for the selected **mode** applies — the rest are inert.
* Raise **gain\_db** on the pro spectrogram to reveal quiet detail; lower **range\_db** to increase contrast.
## Related nodes
* **Audio Analyze** — numeric measurements instead of a picture.
* **Audio Sweep (ESS)** — generate a test signal to visualize a system's response.