To provide a detailed feature list for "kontroller zvuka" (sound controller), I have focused on the most popular professional-grade software in this category, such as , EarTrumpet , and FxSound .

: Customizable On-Screen Displays (OSD) that show a sleek volume bar or percentage whenever the sound level changes.

A high-quality sound controller typically includes these core features:

: Adjust the volume of individual applications independently. This allows you to lower music volume while keeping a voice call or game audio loud.

: Prevents sudden loud noises (like loud ads) from blasting your ears by capping the maximum output level.

: Quickly toggle output between speakers, headphones, or Bluetooth devices with a single click or hotkey.

: Built-in equalizers that provide bass boost, clarity improvements, and surround sound effects to enhance budget speakers or headphones.