01. Find the app's output first
Identify the device carrying its sound, then inspect that output's session. System adjusts the output as a whole; the app row gives you the focused level control.
Missing mixer app
Game missing from the volume mixer? Bring its controls into view.
Balance the game, chat and music you use with SysCubes per-app audio controls. If a row is missing, follow its sound to the output device, check the session filter and inspect the available view. Once the session appears, you can adjust the right level and keep it with your game's profile.
By SysCubes documentation team · Content reviewed
- Per-app playback controls
- Output & session checks
- Game-profile levels
Explore the interactive preview
Change this illustrative session's state and filters, then try the matching check in SysCubes.
SystemDefault output
Example game row is hidden
Hidden by Active sessions only
Turn off Active sessions only to include a retained inactive session, or make the app play audio.
Explore an illustrative audio session to see how its output and the active-session filter affect visibility.
Quick answer
Play audio, then check the device and filter
If a game is not showing in the volume mixer, play audio and check its output. SysCubes lists the Windows default output's sessions; its desktop card shows the first 4 app sessions. Disable Active sessions only to inspect retained inactive sessions. An ended session needs fresh audio.
Trace one app
Find a missing audio session in five checks
Start with the per-app controls on the default Windows output. Note whether the missing app is absent from SysCubes only or from Windows too. That distinction keeps a widget visibility problem separate from a wider sound problem.
Make the app produce audio
Play a game sound, music sample or call test. Opening a launcher or a quiet menu may not create the session you expect. Keep the app open while you inspect the mixers.
Check its actual output
In Windows 11, open Settings > System > Sound > Volume mixer and inspect the app's output. Check the game's or Discord's own device selection too. A pinned headset or monitor output can differ from the Windows default.
Inspect the session filter
In the Volume widget's settings, turn off Active sessions only for this check. Retained inactive sessions can then appear. Expired sessions are excluded regardless of that filter; replay audio or reopen the affected app.
Check the view's row limit
The current desktop card displays its first four available app sessions, plus System. A fifth session may exist without a desktop row. Use the compact overlay's channel picker or expanded channels when that overlay is available.
Retest after routing changes
Selecting an output in SysCubes changes the Windows default for media and games. An app pinned to a device may remain there. Reopen the app if necessary, play new audio and confirm the device before adjusting a row.
The audio list refreshes periodically rather than becoming an installed-app directory. Give a fresh session time to appear. Microsoft's session-state documentation explains why active, inactive and expired are different states.
The list has a scope
What the current mixer can display
| Item | Current value | What it means |
|---|---|---|
| Output scope | 1 Windows default multimedia output | An app routed elsewhere can be absent here. |
| Desktop app rows | First 4 filtered sessions | A later session can exist without a visible desktop row. |
| Session states | 3: active, inactive, expired | The active-only filter hides inactive; expired is excluded. |
| Level range | 0-100%; mute is separate | A quiet row is not the same as a missing session. |
Several processes or browser sessions can belong to similar-looking applications. Read the row's app name and test a small level change while the intended sound plays. Do not assume the launcher's row is the game, or one browser row represents every tab.
The example above models routing and filtering; it does not include the desktop card's ordering. A visible sample row means those conditions pass, not that a real app is guaranteed to occupy one of the first four positions.
Present but unexpectedly quiet?
Check the level and the active game profile
If the app appears, check its mute, slider and System level separately. A 0% app level can silence it even when System is audible. Conversely, System mute affects the output even if the app row looks correctly set.
During a supported active game, app volume and mute edits can be stored in that game's profile. Matching sessions may receive those saved values when they appear. System volume stays global; an explicitly applied audio preset can change the output, master level and app values together.
If a level repeatedly returns when a game starts, inspect that game's saved app levels. The desktop widget offers a control to forget them. Use it intentionally rather than clearing every preset, then make and verify the desired edit while the correct game is active.
Keep the check focused
Trace the output, refresh the session and keep your working profiles
02. Give the app fresh audio
Play a sound or reopen the app to create a fresh session. Turn off Active sessions only to include retained inactive sessions; expired sessions need fresh audio.
03. Check the active game's saved level
Inspect the affected game's app audio before forgetting its saved levels. Adjust that profile deliberately so your other working game setups stay useful.
When the issue is broader
Use Windows as the next checkpoint
If the same app has no sound in Windows, follow Microsoft's app-audio checks: per-app mute and level, output routing, audio services and drivers. Test the app after each change, then return to SysCubes to adjust the live session.
The in-game volume mixer explains the controls once the session is present. Review the balancing workflow, verify the intended row and save only the settings that you want that game to restore.
Your questions, answered
Missing mixer app FAQ
What should I check if a game is not showing in the volume mixer?
If a game is not showing in the volume mixer, play audio and check its output. SysCubes lists the Windows default output's sessions; its desktop card shows the first 4 app sessions. Disable Active sessions only to inspect retained inactive sessions. An ended session needs fresh audio.
Can a muted app still appear in the mixer?
Yes. Mute and volume are separate from the audio session's active, inactive or expired state. A muted app can retain a session and still be listed. Check whether it is using the default output and whether Active sessions only hides it before assuming mute removed the row.
Why can I hear an app that is missing from SysCubes?
The app may be using a different or pinned output device. SysCubes enumerates sessions on the Windows default multimedia output, not every output at once. Check the app's output in Windows Volume mixer and its own sound settings. The desktop card's first-four-session limit can also hide a later row.
Does SysCubes show every app installed on the PC?
No. The mixer shows available audio sessions, not an installed-app inventory. An app without a current session may not appear. The current desktop widget displays only the first four filtered app sessions. The compact overlay can expose more sessions through its channel picker or wider channel list.
Why did an app volume change when I launched another game?
App volume and mute changes can be saved to the active game's profile and restored when matching sessions appear. System volume remains global unless an explicit audio preset changes it. Check the active game and its saved app audio, then adjust the appropriate row or forget that game's saved levels deliberately.
What if Windows also cannot play audio from the app?
Check the app's mute, level and output in Windows Settings, then restart the affected app. If the problem persists outside SysCubes, follow Microsoft's app-audio troubleshooting for Windows audio services and drivers. Record the selected devices first so you can restore the setup after a comparison.
Your PC. In your hands.
Keep the sound balance that suits your game.
Find the live app session, set its level and check the active game's saved audio. Explore SysCubes per-app controls and current Windows release options.
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