How to output sound from a TV to an Android phone

Modern users are often faced with a situation where they need to listen to content from a large screen in private mode. How to output sound from a TV to an Android phonewithout disturbing the silence in the house and without disturbing others? This is relevant for watching movies at night, when someone in the family is already asleep, or when you want to enjoy the sound through high-quality wireless headphones connected to a smartphone, and not through the built-in speakers of the TV.

Fortunately, the ecosystem Android and modern Smart TVs offer many solutions for this task. From built-in operating system features to third-party apps and hardware adapters, the method you choose depends on your TV model and phone firmware version. In this article, we will analyze all the working methods, their pros and cons, as well as possible connection problems.

Often, equipment owners think that audio transmission is only possible through a Bluetooth headset directly paired with the TV. However, if your TV doesn't support this feature or you want to use your phone as an intermediate for audio processing, there are more flexible scenarios. Next, we will look in detail at the technical nuances of each method.

Using the wireless broadcast function (Cast)

The most common and easiest way is to use technology Google Cast or the built-in Screen Mirroring function. Most modern TVs based on Android TV, Google TV, as well as devices with support Chromecast, allow you to transmit not only an image, but also an audio stream to a mobile device if it acts as a controller or receiver.

First, make sure that your smartphone and TV are connected to the same network Wi-Fi. This is a critical condition, without which device detection is impossible. Then on your phone, open the Quick Settings panel (swipe down) and find the “Cast”, “Smart View” (on Samsung) or “Projection” button. In the list of available devices, select your TV.

After connecting, the image from the phone screen will appear on the TV, but we are interested in the reverse process or sound redirection. In some scenarios, when you play content through an app (like YouTube or Netflix) on your phone and tap the cast icon, the audio automatically goes to your TV. But to do the opposite - to output TV sound to the phone - this method works in a limited way and depends on the specific TV model’s support for the function Audio Casting.

Some advanced models allow you to use the phone as a remote speaker through proprietary applications of the manufacturers. For example, in the ecosystem Samsung or LG there are settings that allow you to redirect the audio channel to a paired mobile device within the same network.

⚠️ Attention: When using wireless broadcasting via Wi-Fi, there may be a slight audio delay (latency). For watching movies, this may not be noticeable due to video buffering, but when playing games or watching live broadcasts, the desynchronization of picture and sound can reach 1-2 seconds.

If your TV does not see your phone or the connection is constantly disconnected, check your router settings. Sometimes the client isolation feature AP Isolation blocks direct communication between devices on the local network. Disabling this option in the router settings often solves the detection problem.

Connecting via Bluetooth: direct pairing

The most stable method of transmitting sound without delay is using the protocol Bluetooth. If your TV is equipped with a built-in Bluetooth module, you can connect your smartphone to it as an external audio system or, conversely, use your phone as a headset (although the second option is less common on the TV side).

Most often the scenario looks like this: you connect Bluetooth headphones to your phone, and the phone receives sound from the TV through a special repeater application, or the TV is directly connected to the headphones, and the phone is used as a remote control. But if the goal is to output TV sound to the phone’s speaker, then this is difficult to do using standard Android tools, since the phone usually acts as a source (Source) and not a receiver (Sink).

However, some TVs allow you to connect your smartphone as a Bluetooth headset to output system sounds or application sounds. To do this:

• 📱 Go to Settings TV and find the section Sound or Connections.
• 🔍 Select item List of speakers or Bluetooth devices and turn on the search.
• 🎧 On your phone, turn on Bluetooth and make the device visible to everyone.
• 🔗 Select the phone in the list on the TV screen and confirm pairing with a code.

It is important to understand that not all TVs support the profile A2DP Sinknecessary for transmitting high-quality stereo sound to a third-party device. Budget models often have Bluetooth only for connecting remote controls or keyboards. In this case, a direct connection will not work.

If the connection is successful, the sound from the TV will be completely redirected to the smartphone speaker or headphones connected to it. This is an ideal option for night viewing, since it does not require the installation of additional software and works at the system level.

Third-party applications for audio relay

If the built-in functions do not cope, specialized applications from the store come to the rescue. Google Play. These apps use the power of the local network to capture the audio stream and transmit it to another device. One of the popular solutions is to use applications like AudioRelay or analogs that work on the server-client principle.

The scheme of work is as follows: the server part is installed on the device from which you need to take sound (in this case it is difficult, since the server is usually installed on a PC, but there are solutions for TV), the server part is installed, and the client is installed on the phone. However, since installing an APK on the TV itself is often impossible without root access or complex setup, the reverse scheme is often used: the phone broadcasts sound to the TV. But for our task (TV -> Phone) there are specific scenarios.

Some applications allow you to use your phone as a Bluetooth receiver for a PC, and by analogy, you can try setting up a broadcast if the TV supports installing Android applications. If you have Android TV, you can try installing a sound server application on it, which will send the stream to the client application on your smartphone.

Example of a sequence of actions:
1. Install a sound server on TV (if possible).
2. Install the client on your phone.
3. Enter the TV's IP address in the application on your phone.
4. Click the Connect button.

It is worth noting that this method requires high network speed. Transmission of uncompressed audio requires a stable channel. If the network is overloaded, you will hear crackling and interruptions.

Why may the sound be interrupted?

Interruptions are often caused by interference in the 2.4 GHz band. If your router is dual-band, switch both your TV and phone to the 5 GHz network. This will significantly increase throughput and reduce interference from neighboring networks and microwaves.

Using HDMI and audio extractors

For those who are looking for the highest quality solution without compression and delays, there is a hardware method. It is suitable if you want to output sound from an external source (set-top box, console) connected to the TV to your phone, but in the context of the “TV sound to phone” task, this method requires an output Optical or 3.5 mm on the TV itself.

If your TV has a connector for headphone 3.5 mm or optical output S/PDIF, you can use an external audio interface (sound card) for Android. This device connects to the phone via USB-C or OTG, and the sound card input is connected by a cable to the TV output.

This method turns your smartphone into a professional sound monitor. You can not only listen, but also record sound, process it in real time through equalizer applications.

Connection type	Sound quality	Latency	Setting complexity
Bluetooth	High (AAC/aptX)	Medium (100-200 ms)	Low
Wi-Fi (Cast)	Depends on the network	High (500+ ms)	Average
Cable (Jack/USB)	Maximum (Lossless)	None	High (adapter required)
Applications	Medium (compression)	Depends on software	High

The use of wires ensures that there are no problems with authorization on the network or updating firmware. This is an “analog” solution in the digital world that always works as long as the connectors are working.

Configuration through the developer menu and debugging

For advanced users, there is a method of using debugging tools ADB (Android Debug Bridge). If your TV runs Android, you can connect to it over the network and try to redirect the audio stream programmatically, although standard ADB commands are often designed to input commands rather than capture audio.

However, turning on network debugging can open access to hidden audio menus. To activate this mode, you need to go to Settings → About device and click on the build number 7 times. After this, the menu will display the item For developers.

Inside this section you can find settings regarding Bluetooth codecs and audio configuration. Changing these settings may force the TV to search for available audio outputs more aggressively.

⚠️ Warning: Making changes to the developer menu may result in system instability or factory resets. Write down the initial values of the parameters before changing them so that you can return everything to the way it was.

Also through ADB, you can install applications directly on the TV, bypassing the Google Play store, which allows you to implement specific software for managing the audio stream, which is not available in the official store.

Solving problems with latency and quality

One of the main complaints from users when transmitting wireless audio is desynchronization of lips and voices of actors. This phenomenon is called lip-sync error. Modern TVs have delay compensation settings, but they are not always effective when transmitting to third-party devices.

If you notice that the sound lags behind the picture, try changing the sound settings in the TV menu. Switching the sound mode from “Cinema” to “Standard” or “Game” often helps, since in the latter unnecessary post-processing that adds delay is disabled.

It is also worth checking the settings of the application itself through which the broadcast is taking place. Some players have an audio sync slider that allows you to manually move the audio track forward or backward by a few milliseconds.

When using Bluetooth codecs, the choice of codec plays a decisive role. Codecs SBC are the most universal, but have a high latency. Codecs aptX Low Latency or LDAC provide better synchronization, but require support from both the transmitter (TV) and the receiver (phone/headphones).

⚠️ Attention: Interfaces and menu names may differ depending on the firmware version of your TV and the Android shell. If you do not find this option, check the official instructions for your specific model, since manufacturers often change the logic of the settings.

Frequently asked questions (FAQ)

Is it possible to output sound from a regular (non-Smart) TV to your phone?

Yes, this is only possible using hardware. You will need a cable with a 3.5 mm connector (or an RCA adapter), which connects to the headphone output of the TV, and an external USB sound card with an input Line-In or Mic-Inconnected to the phone via an OTG adapter. This cannot be done using software methods without Smart functions.

Why, when connected via Bluetooth, is the sound only in one channel (mono)?

This may be due to an incorrect connection profile. Make sure that the “Media Audio” and “Phone Sound” checkboxes are activated in the Bluetooth settings on your phone for the connected TV. The problem may also be an outdated version of Bluetooth on one of the devices that does not support the A2DP stereo profile.

Does audio output to the phone affect the picture quality on the TV?

No, splitting the audio stream does not affect the video signal. The picture will remain in its original resolution and quality. However, if you are using software broadcasting over Wi-Fi with a high load on the TV processor, in rare cases, mikro-slowdown of the interface, but not the video itself, is possible.

Does this method work for all applications, including cable TV?

When using Bluetooth or a cable connection, the system sound is transmitted, so it will work for any sources: terrestrial TV, built-in applications or games. When using the Cast function, support varies by application: some content-protected services may block audio from being transmitted to third-party devices due to DRM protection.