Modern platform TVs Android TV offer an incredible visual experience, but built-in acoustics often leave much to be desired. Thin cases physically do not allow for high-quality speakers, which is why the sound becomes flat, lacks bass and is lost in loud scenes. Many users resign themselves to this, believing that the situation can only be improved by purchasing expensive equipment, but this is a fundamental misconception.
In fact, the operating system provides deep capabilities for customizing the audio stream, which are hidden by default or set to average values. Proper adjustment of software parameters can unlock the potential of even standard speakers, and the correct connection of external equipment will turn your TV into a full-fledged home theater.
In this article we will analyze in detail all stages of optimization: from basic equalizer settings to advanced methods of transmitting sound through ARC and eARC. You will learn which codecs to choose for maximum quality and how to get rid of audio and video desynchronization, which is often annoying when watching movies.
Basic settings of the built-in equalizer and sound modes
The first step to high-quality sound is to abandon standard presets. Manufacturers often enable Standard or Cinema modes, which artificially boost high frequencies, making dialogue harsh and explosions boomy. You need to go to the menu Settings → Device → Sound and carefully study the available profiles.
If your TV model supports manual frequency adjustment, be sure to use this. For most films and TV series, the optimal solution is to slightly increase the low frequencies (bass) and moderately reduce the high frequencies to remove the “sand” from the actors’ voices. You should not turn the sliders to the maximum, as this will lead to distortion and wheezing on cheap speakers.
Pay attention to the function Automatic volume control. It is designed to equalize the sound level when switching channels, but when viewing content through streaming services, it often “strangles” the dynamic range, making quiet scenes too loud and loud scenes flat.
- 🎚️ Try the “Custom” or “Manual” mode for fine-tune to the acoustics of your room.
- 🔇 Turn off Automatic Volume Control when watching movies to preserve the original sound design.
- 🗣️ Activate Clear Voice mode if you have difficulty understanding characters speaking against background music.
- 🎵 Avoid "Sports" or "News" modes for movies, as they greatly cut the low frequencies.
⚠️ Attention: Some TV models reset custom equalizer settings when switching the signal source (for example, from HDMI to a built-in application). Check the settings every time you change the source.
Choosing the audio output format and working with codecs
Sound quality directly depends on what bitstream format your system chooses. In the sound settings menu, you often find the “Digital output” or “Sound format” item. It is critical to select the correct mode depending on the connected equipment.
If you are using an external speaker system or sound bar that supports surround sound, you need to switch the setting to Pass-through (Pass-through) or “Bitstream” mode. This will allow the TV to transmit the original signal (for example Dolby Digital Plus or DTS) to the decoder of the external system without processing, providing true multi-channel sound.
If you are using only the TV's built-in speakers or simple stereo speakers, you should select the PCMmode. This format is uncompressed digital audio that the TV can correctly process on its own. Selecting the wrong format may result in complete silence or static noise.
Settings → Sound → Advanced settings → Digital output → Automatic / PCM / Pass-throughIt is worth noting that not all applications support surround sound transmission. For example, some free online cinemas broadcast the signal only in stereo, regardless of your settings.
If the sound disappears when you select the Pass-through mode, check whether your external speakers support the specific codec (for example, DTS) that the application broadcasts. In this case, temporarily return the setting to PCM.
Connecting external acoustics: HDMI ARC, eARC and Optics
To radically improve sound quality, it is recommended to connect an external audio system. The modern standard is the interface HDMI ARC (Audio Return Channel), which allows you to transmit sound from a TV to a receiver or soundbar over the same cable as the video signal.
A more advanced version of the standard - eARC - provides sufficient bandwidth for transmitting uncompressed high-definition formats, such as Dolby Atmos and DTS:X. If your TV and soundbar support eARC, be sure to use an HDMI 2.1 cable or a high-quality High Speed cable with Ethernet support.
Optical output (S/PDIF) remains an alternative option. It is reliable and not subject to electromagnetic interference, but has a bandwidth limitation: formats higher than 5.1 channels cannot be transmitted through “optics” without compression. Connecting via Bluetooth is possible, but is not recommended for cinema due to the inevitable audio delay.
| Connection type | Maximum quality | Audio delay | Recommendation |
|---|---|---|---|
| HDMI eARC | 7.1, Dolby Atmos (Lossless) | Minimum | Ideal for new systems |
| HDMI ARC | 5.1, Dolby Digital Plus | Low | Standard for most TV |
| Optics (S/PDIF) | 5.1 (compressed) | Low | For old acoustics |
| Bluetooth | Stereo (SBC/AAC) | High (out of sync) | Only for music |
⚠️ Attention: HDMI cables differ in their opportunities. A regular cheap cable may not be suitable for eARC operation. Make sure the cable is marked "High Speed" or "Ultra High Speed".
Eliminating audio delay (Lip-sync) and desync
One of the most common problems on Android TV is desync between audio and video when the actor's lip movement is ahead of it. words or lags behind them. This phenomenon is called Lip-sync error and often occurs when using wireless headphones, Bluetooth speakers, or when processing heavy video streams by the TV processor.
In modern models, the latency correction function is often built into the system. It may be called “Audio and Video Sync” or “A/V Sync”. Try switching this parameter to find a position where the picture and sound match.
If automatic correction does not help, you can use third-party players such as VLC for Android or Kodi. Their settings include manual adjustment of audio delay with millisecond precision. You can adjust this parameter directly while watching by pressing buttons on the remote control.
☑️ Desync diagnostics
It is also worth disabling all image “enhancers”, such as Motion Smoothing or noise reduction. These functions take time to process the frame, causing the video to lag behind the audio track, which is processed faster.
Using third-party applications and equalizers
Native Android TV tools do not always provide sufficient control over the sound. In the store Google Play on your TV you can find specialized applications that intercept the audio stream and apply complex processing algorithms to it.
Applications like Flat Equalizer or Bass Booster allow you to create presets for different genres of content. Some of them have an automatic calibration function through the smartphone's microphone, analyzing the acoustics of the room and adjusting frequencies for the best perception at a specific listening point.
However, installing such apps requires caution. They consume RAM and processor resources, which can lead to slowdown of the interface or the video itself, especially on budget TV models with a small amount of RAM.
⚠️ Attention: Third-party equalizers may conflict with system audio settings. If after installing the application the sound disappears or begins to crackle, remove it and reboot the device.
Secret setting for developers
In the “For Developers” menu (which must be activated by clicking 7 times on the build number in the “About TV” section), sometimes additional settings for audio codecs and buffering, but changing these parameters without understanding can lead to unstable operation of the system.
Advanced settings via ADB and system commands
For advanced users who want to get the most out of their device, it is possible to configure the sound through debugging via ADB (Android Debug Bridge). This method allows you to change hidden system parameters that are not accessible through the regular menu.
By connecting to the TV from a computer, you can force change global volume settings or turn off system interface sounds that may interfere with viewing. You can also change the priority of audio channels.
adb shell settings put global volume_settings_sounds 0This command, for example, turns off system navigation sounds. Be extremely careful when entering commands: an incorrect parameter can cause the sound to disappear completely, and it can only be returned by resetting to factory settings.
Using ADB gives complete control over the system, but requires technical knowledge. Always write down the original settings before changing them to be able to rollback.
Frequently asked questions and problems with sound on Android TV
Why is there no Dolby Atmos sound on Android TV, although it is stated in the specifications?
Most often the problem lies in the output settings. Make sure that the mode in the sound menu is Pass-throughand not PCM. In addition, the content itself (movie or series) must be encoded in the Atmos format. If you are watching a regular stereo video, the TV will not be able to artificially create real Atmos object sound.
How to connect regular wired headphones to a TV without a 3.5 mm jack?
Most modern Android TVs do not have an analog output. You will need a digital-to-analog converter (DAC) that plugs into the optical output or USB port of your TV. You can also use a Bluetooth adapter that supports the aptX Low Latency codec to minimize latency.
There is sound, but it is very quiet, even at maximum volume. What to do?
Check the settings of a specific application (for example, YouTube or Netflix), it may have its own volume control. Also make sure that the Night Mode mode is not activated, which limits the dynamic range. In extreme cases, external acoustics will help.
Is it possible to improve the sound by updating the firmware?
Yes, manufacturers often release updates that fix audio driver bugs, improve the equalizer, or add support for new codecs. Check the section regularly Settings → About TV → System update.