You can change notification sounds for emails and calendar events directly within the new Outlook app for Windows. In classic Outlook, you can choose whether to play a sound when a new email arrives.

If your Windows computer is making notification sounds when sleeping, restart it and see if it helps. At times, the issue is nothing but a glitch that can be resolved by rebooting. In case the issue ...

If you're tired of adjusting Windows volume constantly, EarTrumpet allows you to control individual app volume directly from the taskbar.