No Sound on Screen Mirroring? Check Mute and Volume First

Updated 5 November 2026 · Standard formula, shown below

When screen mirroring has no sound, check mute, volume, and the selected audio output before assuming a codec is responsible. These simple routing and volume problems are common, while codec incompatibility is more likely when a particular file or app fails consistently.

Where Mirrored Audio Goes

Screen mirroring sends some or all of a device’s display to another screen, but audio handling depends on the devices, connection method, app, and settings. Sound may play through the receiving television or monitor, remain on the phone or computer, or be routed to a separate speaker or headset.

That distinction matters: a picture on the television does not prove that the television is the active audio output. A phone can mirror its screen while still sending sound to Bluetooth earbuds. A computer can display on an external monitor whose built-in speakers are absent, disabled, or not selected. Some apps also handle video and audio casting differently from full-screen mirroring.

Check Mute, Volume, and Audio Output First

Before changing codecs or installing software, check the controls at both ends of the connection. Make sure the source device is not muted, raise its media volume, and adjust the receiving screen’s volume. If a soundbar, receiver, or external speaker is involved, check its volume and input as well.

Confirm the source device’s media volume is up. Ringer volume and media volume can be separate controls on phones.
Check the television or monitor is not muted and is using the input connected to the mirroring receiver.
Open the source device’s audio-output selector and choose the television, receiver, or intended wireless device.
Temporarily disconnect Bluetooth headphones or speakers to see whether they are capturing the audio.
Test a second video or a familiar system sound. This helps distinguish a general routing fault from a problem limited to one app or file.

Use a modest volume while testing. If sound returns suddenly after reconnecting or changing the output, the level may be higher than expected.

How Mirroring and Audio Routing Differ

Mirroring is not one universal protocol. Depending on the platform, the connection may carry a screen image and audio together, negotiate audio separately, or let an app send media directly to a receiver. Wireless connections can also introduce delay or interruptions that do not occur with a wired connection.

With a computer connected by HDMI, for example, the operating system may continue playing sound through its built-in speakers even though the display is visible on the television. Selecting the HDMI-connected display or receiver as the output can resolve this. With wireless mirroring, the source’s output menu may show the receiving screen by name, while the television may have its own sound-output setting.

Not every monitor has speakers. If the picture appears on a monitor without audio hardware, sound must be played through the computer, headphones, or another connected speaker. A cable or adapter can pass audio only if the devices and connection support it.

Try These Troubleshooting Steps in Order

Check basic controls. Raise media volume on the source and volume on the receiver; confirm neither is muted.
Select the intended output. Use the device’s sound or audio-output controls to route sound to the TV or receiver. Disconnect unused Bluetooth devices for the test.
Check the receiving setup. Confirm the TV is on the right input and that its sound output is set to its speakers or the connected sound system. Verify the soundbar or receiver is on the matching input.
Test another source. Play a different video or a system sound. If only one app is silent, check that app’s mute control, permissions, and playback settings.
Reconnect and restart. Stop mirroring, reconnect the devices, and, if needed, restart them. This can clear a temporary connection or negotiation problem.
Try another connection method. If available, compare wireless mirroring with a supported wired connection, or test the same content on another receiver. Change one thing at a time so the result is useful.

Menu labels vary by device and operating-system version, so look for terms such as Sound, Audio output, Speakers, or Playback device rather than relying on a single path.

When a Codec or Format Could Be Involved

A codec is software or hardware used to encode or decode audio or video. A codec issue is plausible when the receiving device cannot decode the audio format in a particular file or stream. A useful clue is that some videos play with sound while one specific file does not, even though system sounds and other content work normally.

However, silent playback does not by itself identify a codec problem. The file could have no audio track, use an unsupported format, or have a damaged track; the app might be muted; or the receiver might not support the chosen audio format. Some apps also restrict or handle external playback differently. Check the app’s supported formats and the receiver’s documentation before converting files or changing advanced settings.

If the issue affects all apps and content, return to output selection, mute controls, and the receiving system before focusing on codecs. If it affects only one file, test a known-good file in another compatible player. Avoid downloading codec packs from unfamiliar sources; they can introduce unwanted or unsafe software.

Common Misconceptions and Useful Clues

“The picture is mirrored, so audio must be too.” Video and audio can follow different routes or be controlled separately.
“The codec is always the cause of silence.” Routing, mute, unsupported speakers, and app-specific settings are simpler explanations to rule out first.
“A monitor should make sound.” Many monitors have no speakers, and even a monitor with speakers may not be selected as the computer’s output.
“A Bluetooth device is disconnected because it is not being used.” A paired headset or speaker may still be the active output, so check the output selector.

Note whether silence occurs everywhere or only in one app, file, or connection type. That pattern is more useful than repeatedly changing unrelated settings.

Frequently Asked Questions

Why can I see my phone screen on the TV but hear no sound?
Check the phone’s media volume and audio-output selector, then check the TV’s mute and sound output. Audio may still be routed to Bluetooth headphones or another device.

Does screen mirroring always send audio to the TV?
No. Audio behavior depends on the device, app, and mirroring method. Some setups route sound to the receiver; others leave it on the source or use an app-specific playback route.

How can I tell whether the problem is a codec?
If all mirrored content is silent, first suspect mute, routing, or receiver settings. A format issue becomes more plausible when only a particular file or stream fails while other audio works.

Why is there no sound when I mirror to a computer monitor?
The monitor may not have speakers, or it may not be selected as the computer’s audio output. Use the computer’s speakers or connect a suitable audio device if the monitor cannot play sound.

Will restarting fix screen-mirroring audio?
It can clear a temporary connection problem, but it will not fix a persistently wrong output selection, muted device, unsupported file format, or a receiver without speakers. Check those settings first.

Method: the standard formula for this calculation, rounded as each result states. See how the calculators work or report an error.