> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://help.nimbata.com/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# How to add call whispers

|| To use the templated setup instead, see: [Template: how to add call whispers](https://help.nimbata.com/en/article/template-how-to-add-call-whispers-ujfy8f/).

A **Whisper** is a short audio message played only to the agent the moment they pick up, before the caller can hear anything. 
It gives the agent instant context so they can tailor their response before saying hello.
E.g. "Call from Christmas Radio Campaign".

### Step 1. Open the Call Flow Builder

* Go to [Tracking > Call Flows](https://app.nimbata.com/tracking/call-flows).
* Click **Create** to start a new call flow, or click an existing call flow to edit it.

### Step 2. Add the Whisper action

A "New Call" flow has been created and it includes two + buttons, with the "Dial" option in between them.

* Click the **+** button below the Dial destination.
* Select **Whisper** from the Add-ons menu.

![](https://storage.crisp.chat/users/helpdesk/website/-/2/f/4/5/2f459a49cf382400/image_82fk6l.png)

### Step 3. Configure the whisper message

* Choose **Text to Speech** to type a message directly, or choose **Tracking Number Whisper** to assign a different audio file per tracking number from the Media Library.

![](https://storage.crisp.chat/users/helpdesk/website/-/2/f/4/5/2f459a49cf382400/image_1ny61ru.png)

### Step 4. Assign per-number whispers in the Media Library (if using Tracking Number Whisper)

* Go to [Media Library](https://app.nimbata.com/media-library).
* Click the **+** next to each tracking number in the call flow.
* Select the audio file to play for that number.

![](https://storage.crisp.chat/users/helpdesk/website/-/2/f/4/5/2f459a49cf382400/image_sq4w7v.png)

---

🎉 Done. Agents will now hear the whisper the moment they pick up, before speaking to the caller.
Detailed Guide: [**Template: how to add call whispers**](https://help.nimbata.com/en/article/template-how-to-add-call-whispers-ujfy8f/) 
Detailed Guide: [**How to access the media library**](https://help.nimbata.com/en/article/how-to-access-the-media-library-1lok4mv/) 
Detailed Guide: [**How to assign tracking numbers to call flows**](https://help.nimbata.com/en/article/how-to-assign-tracking-numbers-to-call-flows-uxu7qb/)