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VolumeHub uses Apple's Audio Tap API (introduced in macOS 14.4) to intercept and adjust audio from individual apps. macOS classifies this as microphone access because the API taps into audio streams. However, no audio is ever recorded or transmitted — it's processed in real-time solely to apply your volume adjustments and display audio meters.

macOS 14.2 Sonoma or later is required. The Audio Tap API that VolumeHub relies on was introduced in macOS 14. Earlier versions of macOS do not support per-app audio tapping without kernel extensions.

VolumeHub only shows apps that are actively producing audio. If an app isn't playing any sound, it won't appear in the list. Once the app starts producing audio, it will show up automatically. You can also check Settings to make sure the app hasn't been hidden.

Open VolumeHub from the menu bar, click the gear icon to open Settings, then scroll to the Hidden Apps or Hidden Outputs section. Click the Show button next to any hidden item to make it visible again, or use Show All to restore everything at once.

This is expected behavior. VolumeHub adjusts audio in real-time using the Audio Tap API, which operates on active audio sessions. When an app restarts, a new audio session is created and VolumeHub reapplies your saved volume preferences. If volumes aren't being restored, make sure VolumeHub is set to Launch at Login in Settings.

Click the list icon in the VolumeHub toolbar (next to the gear icon). Each click cycles through the three density modes: Compact, Comfort, and Full. Compact shows just icons and sliders, Comfort adds app names, and Full includes status labels and larger icons.

Compact — Icon-only rows with inline sliders. No app names (hover the icon for a tooltip). Most space-efficient.

Comfort — App icon, name, status, and slider on each row. The default balanced view.

Full — Large icons with name and status on separate lines, plus a dedicated slider row. Maximum detail.

Simple mode gives you clean, straightforward volume sliders for each app — perfect if you just want quick control.

Pro mode unlocks the full feature set: per-app 10-band equalizer, real-time audio meters, Focus Audio with auto-ducking, and output device routing. Switch between them in Settings.

Switch to Pro mode first, then expand the EQ panel on any app's row. You'll see a 10-band equalizer (32 Hz to 16 kHz) with vertical sliders. Choose from 17 built-in presets organized by category (Music, Voice, Correction, Spatial) or create your own.

Custom presets can be saved, renamed, and deleted from the preset picker. Your settings are remembered per app.

Focus Audio automatically lowers the volume of other apps when a designated focus source (like Zoom, Teams, or Discord) is producing audio. It's great for calls — music and other sounds duck automatically so you can hear the conversation.

VolumeHub auto-suggests communication apps as focus sources. You can configure the ducking level per app, exempt specific apps, and the feature includes a grace period to avoid flutter during speech pauses.

VolumeHub is available in 7 languages: English, German, Spanish, French, Japanese, Portuguese (Brazil), and Simplified Chinese. The app follows your macOS language setting automatically.