Scan Beeps - Rapid Deployment

Scan Beeps - Rapid Deployment

i have an issue where i get variable volume levels when i scan Staging Barcodes, The confirmation Beep is loud sometimes and quite other times.

the Volume in media player and in Datawedge is normal and controllable via the volume buttons. But quite in Rapid Deployment.

Any thoughts? is there an independent volume control for rapid deployment?

cheers all