Change this value to (the maximum supported software limit). Click Save and Restart VLC . 2. Alternatives to Mimic "400%" Boost
VLC is different. By default, the volume slider in the VLC interface goes up to . However, in the settings, you can unlock the potential to amplify audio up to 200%, 300%, or 400% . This effectively applies a software amplification filter, making quiet sounds louder without needing to touch your computer’s master volume. vlc media player volume 400
While the visual slider may stop earlier, you can force the volume higher using these methods: Mouse Scroll Change this value to (the maximum supported software limit)
: Hold Ctrl + Up Arrow to increase volume incrementally past the standard limit. Increasing the Configurable Limit (Up to 300%) in the settings