Since the default volume settings in different speech servers are different, the volume of a pre-recorded prompt may vary for each TTS server.
To make this volume consistent, you can configure the TTS prosody volume from the Add Application or Change application page in EPM.
Proposed Solution
To resolve this, perform one of the following actions:
Set the TTS parameter that is, Prosody Volume or Prosody Rate on the Change Application page, to an audible volume range that is greater than zero and less than 100.
Note:
You must set the Prosody Volume and Prosody Rate values to 50.
Initialize short prompt first.
Setting the Prosody Volume and Prosody Rate values to 50 ensures that:
The TTS resource is properly initialized for the request.
All prompts from different speech server with different default volume settings, that include prerecord prompts, are played at the same volume.
