> ## 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 Analyze
> Measure a track — integrated loudness (LUFS), peak/mean volume, statistical stats, or silence segments — and get a structured report.
## What this node does
**Audio Analyze** runs an FFmpeg measurement pass over a track and returns a JSON report as text. It does not change the audio. Depending on **mode** it uses `ebur128` (broadcast loudness), `volumedetect` (peak/mean dB), `astats` (detailed statistics), or `silencedetect` (silence segments). In loudness mode it also compares the result against common platform delivery targets.
It takes a `COMFYTV_AUDIO` snapshot (or a `COMFYTV_VIDEO`, whose audio track is used) and outputs `COMFYTV_TEXT`. 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
* Check a mix's integrated loudness (LUFS) and true peak before delivery to YouTube, Spotify, etc.
* Find the peak and mean volume to plan gain/normalization.
* Locate silent gaps in a recording (for trimming or splitting).
## Parameters
### mode
What to measure. Options:
* **loudness** (default) — EBU R128 integrated LUFS, LRA, thresholds, and true peak; adds a **platforms** compliance breakdown. Requires a clip of at least \~400 ms.
* **volume** — mean and max volume in dB, plus sample count.
* **stats** — overall statistics: DC offset, peak/RMS levels, flat factor, peak count.
* **silence** — a list of silence segments (start/end/duration) plus a count.
### silence\_noise\_db
Silence detection threshold in dB, **-100 to 0** (default **-60**). Anything quieter than this counts as silence. Used only in `silence` mode.
### silence\_duration
Minimum length (seconds) a quiet stretch must last to count as silence, **0.01–60** (default **2.0**). Used only in `silence` mode.
## Outputs
| Output | Type | Meaning |
| ---------- | -------------- | ---------------------------------------------------------------- |
| **report** | `COMFYTV_TEXT` | A JSON report of the measured values (fields depend on **mode**) |
## Tips
* **loudness** needs a clip long enough (≈400 ms minimum) or `ebur128` produces no summary and the node errors.
* The **platforms** field in loudness mode tells you whether the track meets typical streaming targets at a glance.
* This node is read-only — pair it with **Audio Loudness** or **Audio Dynamics** to actually correct the levels it reports.
## Related nodes
* **Audio Loudness** — normalize to a target LUFS after measuring here.
* **Audio Visualize** — see the waveform or spectrum instead of numbers.
* **Audio Dynamics** — compress/limit to control peaks this node reveals.