The Bot Reply Node supports dynamic audio playback using Audio Variables. This capability allows you to play audio files from a URL stored in a variable, instead of relying only on fixed audio assets.

By using Audio Variables, you can simplify dialogue design, improve response performance, and deliver personalized audio responses at runtime without adding additional nodes or workarounds.

Steps to Configure Audio Variable in Bot Reply Node

• Open the AI Agent task builder

  1. Open your AI Agent application.

  2. Click Build in the left navigation pane.

  3. Select Tasks.

  ​

• Create a dialogue tree

  1. Click the Caret icon in the top-right corner.

  2. Select Create Dialogue Tree.

  3. Enter a Name and Description that define the context and behavior.

  4. Select the Languages supported by the dialogue.

  5. Click Save.

  ​

• Add a Bot Reply node

  1. In the dialogue tree builder, click the Plus (+) icon.

  2. Select Bot Reply Node.

  3. Open the Voice tab.

  ​

• Configure Audio Variable

  1. In the Add Bot Reply window, under Voice Reply, select Audio Variable.

  2. Choose the variable that contains the audio file URL.

  3. Ensure the selected variable resolves to a valid and accessible audio URL.

     ​

  ​

• Save the configuration

  1. Click Save to apply your changes.

​

Result

When the dialogue executes, the Bot Reply Node dynamically retrieves and plays the audio file from the selected variable. This enables flexible, scalable, and personalized audio responses within the same node.