YourMixer

A custom volume mixer to replace the default one.

YourMixer replaces the standard Windows Volume Mixer with a fully customizable volume controller.

More: Github repo

Positioning

This module automatically positions itself. You can learn how to change the positioning here.

Multiple volume bars for an app?

This is an intended feature. Some apps would have different output channels, for example Discord would have one for notification sounds and one for voice chat sounds.