Audio Fix / setup help

Windows 11: one Bluetooth media app is muted while other media already works

Check one confirmed-muted media app without changing the already-working Bluetooth endpoint or increasing volume.

Manufacturer-documented Reviewed 2026-11-09 · Revision 1

When this guide applies

The selected exact listed model already plays another app audibly from Windows 11 at a quiet level. Only one media app is silent, its slider is at a known quiet nonzero level, and no call/update/other source is active.

Connection scope: Bluetooth. Symptom: There is no playback sound.

This is a documented check, not a diagnosis of your equipment. The model name does not confirm the selected input, mode, software or connected partner.

If your exact model or a required setting is unknown, use the “I don’t know” branch below. Do not apply a similarly named model’s instructions.

Checks and possible outcomes

Start at scope. Follow the link that matches what you actually observe. Alternative branches are not a single sequence of actions.

scope

Confirm the model and connection

Look for: Confirm this exact setup and observation before continuing.

If Yes, I confirm → Open the app mixer
If No / my setup differs → Continue with source and model support
If I cannot confirm → More information is required

Manufacturer-documented TOZO NC9 Pro — official tozo nc9pro transport ↗2026 touchscreen NC9 Pro, Calls & Connectivity and FAQ laptop support — The exact touchscreen-case NC9 Pro supports Bluetooth media and calls with compatible laptops. It is not the older NC9 or a same-name unit without the 1.47-inch screen.Exact TOZO NC9 Pro. · Source checked 2026-11-09
Manufacturer-documented TOZO NC9 Pro — official windows app volume ↗Windows 11 Solution1: Volume mixer app mute — Windows 11 has independent app mute controls in System > Sound > Volume mixer. A muted app can remain silent while other audio plays.Exact TOZO NC9 Pro. · Source checked 2026-11-09

Open the app mixer

On Windows 11 open Start > Settings > System > Sound > Volume mixer. Keep the already-working headset/speaker output unchanged.

Look for: Observe the named indication or available control; stop if absent.

If I completed this check → Is this one app muted?
If I cannot complete this → Continue with source and model support
If I cannot determine this → More information is required

Manufacturer-documented TOZO NC9 Pro — official tozo nc9pro transport ↗2026 touchscreen NC9 Pro, Calls & Connectivity and FAQ laptop support — The exact touchscreen-case NC9 Pro supports Bluetooth media and calls with compatible laptops. It is not the older NC9 or a same-name unit without the 1.47-inch screen.Exact TOZO NC9 Pro. · Source checked 2026-11-09
Manufacturer-documented TOZO NC9 Pro — official windows app volume ↗Windows 11 Solution1: Volume mixer app mute — Windows 11 has independent app mute controls in System > Sound > Volume mixer. A muted app can remain silent while other audio plays.Exact TOZO NC9 Pro. · Source checked 2026-11-09

Is this one app muted?

Does the exact affected app show its mute icon enabled, with its slider at the known quiet nonzero level?

Look for: Confirm the actual visible state before a change.

If Yes, confirmed → Unmute only that app
If No, this state differs → Continue with source and model support
If I cannot confirm → More information is required

Manufacturer-documented TOZO NC9 Pro — official tozo nc9pro transport ↗2026 touchscreen NC9 Pro, Calls & Connectivity and FAQ laptop support — The exact touchscreen-case NC9 Pro supports Bluetooth media and calls with compatible laptops. It is not the older NC9 or a same-name unit without the 1.47-inch screen.Exact TOZO NC9 Pro. · Source checked 2026-11-09
Manufacturer-documented TOZO NC9 Pro — official windows app volume ↗Windows 11 Solution1: Volume mixer app mute — Windows 11 has independent app mute controls in System > Sound > Volume mixer. A muted app can remain silent while other audio plays.Exact TOZO NC9 Pro. · Source checked 2026-11-09

Unmute only that app

With its slider already at a previously comfortable low level, click the affected app’s mute icon once to remove its confirmed mute. Do not raise system or device volume.

Look for: Observe the named indication or available control; stop if absent.

If I completed this check → Retry the same app media
If I cannot complete this → Continue with source and model support
If I cannot determine this → More information is required

Manufacturer-documented TOZO NC9 Pro — official tozo nc9pro transport ↗2026 touchscreen NC9 Pro, Calls & Connectivity and FAQ laptop support — The exact touchscreen-case NC9 Pro supports Bluetooth media and calls with compatible laptops. It is not the older NC9 or a same-name unit without the 1.47-inch screen.Exact TOZO NC9 Pro. · Source checked 2026-11-09
Manufacturer-documented TOZO NC9 Pro — official windows app volume ↗Windows 11 Solution1: Volume mixer app mute — Windows 11 has independent app mute controls in System > Sound > Volume mixer. A muted app can remain silent while other audio plays.Exact TOZO NC9 Pro. · Source checked 2026-11-09

Retry the same app media

Play the same familiar passage in that app at the retained low level.

Look for: Observe the named indication or available control; stop if absent.

If I completed this check → Check the result
If I cannot complete this → Continue with source and model support
If I cannot determine this → More information is required

Manufacturer-documented TOZO NC9 Pro — official tozo nc9pro transport ↗2026 touchscreen NC9 Pro, Calls & Connectivity and FAQ laptop support — The exact touchscreen-case NC9 Pro supports Bluetooth media and calls with compatible laptops. It is not the older NC9 or a same-name unit without the 1.47-inch screen.Exact TOZO NC9 Pro. · Source checked 2026-11-09
Manufacturer-documented TOZO NC9 Pro — official windows app volume ↗Windows 11 Solution1: Volume mixer app mute — Windows 11 has independent app mute controls in System > Sound > Volume mixer. A muted app can remain silent while other audio plays.Exact TOZO NC9 Pro. · Source checked 2026-11-09

observe

Check the result

Does the previously silent app now play through the same already-working Bluetooth output?

Look for: Confirm this exact setup and observation before continuing.

If Yes, I confirm → Checks completed
If No / my setup differs → Continue with source and model support
If I cannot confirm → More information is required

Manufacturer-documented TOZO NC9 Pro — official tozo nc9pro transport ↗2026 touchscreen NC9 Pro, Calls & Connectivity and FAQ laptop support — The exact touchscreen-case NC9 Pro supports Bluetooth media and calls with compatible laptops. It is not the older NC9 or a same-name unit without the 1.47-inch screen.Exact TOZO NC9 Pro. · Source checked 2026-11-09
Manufacturer-documented TOZO NC9 Pro — official windows app volume ↗Windows 11 Solution1: Volume mixer app mute — Windows 11 has independent app mute controls in System > Sound > Volume mixer. A muted app can remain silent while other audio plays.Exact TOZO NC9 Pro. · Source checked 2026-11-09

Possible result

More information is required

An unknown state is not a diagnosis. Record the last visible indication and consult the exact model instructions.

insufficient data

Reaching this result does not mean the issue is solved. Only your own feedback can report improvement.

Possible result

Continue with source and model support

Keep the source, connection and last observation. Do not reset, open equipment or change full-scale output to compensate for an unconfirmed result.

next support

Reaching this result does not mean the issue is solved. Only your own feedback can report improvement.

Possible result

Checks completed

The requested observation was confirmed in this setup. It does not establish a hardware repair or guarantee another source behaves the same.

steps completed

Reaching this result does not mean the issue is solved. Only your own feedback can report improvement.

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