> ## 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 Convolve (IR)
> Convolution reverb — stamp the acoustic character of a real space (or any impulse response) onto your audio.
## What this node does
**Audio Convolve (IR)** convolves an audio track with a second audio clip used as an **impulse response** (IR) — a recording of how a space or device responds to a short impulse. The result carries the reverb tail, coloration, or filtering baked into that IR. This is the classic technique behind convolution reverbs and cabinet/speaker simulation.
It takes a `COMFYTV_AUDIO` snapshot on **audio** (or a `COMFYTV_VIDEO`, whose audio track is used) and a second `COMFYTV_AUDIO` on **ir**, and outputs processed `COMFYTV_AUDIO`. It has a ▶ **Run**. An impulse response on the **ir** input is required — the node errors if it's empty.
To feed native ComfyUI `AUDIO` in or out, insert a **Bridge** — see [bridges.md](https://github.com/jtydhr88/ComfyTV/blob/main/docs/bridges.md).
## When to use it
* Place a dry vocal or instrument inside a real hall, church, or room captured as an IR.
* Simulate a guitar cabinet or hardware device from its impulse response.
* Extract an IR with **Audio Deconvolve** first, then apply it to any source here.
## Parameters
### wet
Level of the convolved (processed) signal, **0.0–2.0** (default **1.0**). Values above 1 amplify the wet path.
### dry
Level of the original (unprocessed) signal mixed back in, **0.0–2.0** (default **0.0**). Raise for a mix of dry + reverberant sound; leave at 0 for fully wet.
### normalize
Boolean, default **on**. Normalizes the impulse response so a loud IR doesn't blow out the output level.
## Outputs
| Output | Type | Meaning |
| --------- | --------------- | ---------------------------- |
| **audio** | `COMFYTV_AUDIO` | The convolved audio snapshot |
## Tips
* The **ir** input is mandatory — wire an impulse-response clip (a captured reverb or a synthetic IR) into it.
* For a natural reverb blend, keep **dry** near the source level and add **wet** to taste rather than going fully wet.
* Turn **normalize** off only if you want the IR's raw gain to pass through.
## Related nodes
* **Audio Deconvolve (IR)** — recovers an impulse response from a swept-sine recording.
* **Audio Sweep (ESS)** — generates the sine sweep used to capture an IR.
* **Muse Reverb (FDN)** — an algorithmic reverb alternative that needs no IR.