Modern TVs, even the most expensive models with thin bodies, are often inferior in quality to built-in speakers compared to external audio systems.
To unlock the potential of watching movies and listening to music, you need to properly organize the transmission of audio signals from the screen to powerful speakers.
The connection process may seem complicated due to the abundance of connectors and settings, but with the right approach you can enjoy surround sound in just a few minutes.
Selecting the optimal interface for connection
The first step is to determine the available ports on your device LG OLED or Samsung QLED, since the quality and functionality of signal transmission depends on this. The most progressive standard today is HDMI ARC (Audio Return Channel), which allows you to transmit audio and control volume with one cable.
If your cinema supports the format Dolby Atmos, the use of conventional optical cable may limit the system's capabilities by not allowing high-definition multi-channel streams to pass through. In this case, priority remains connection via eARC (Enhanced Audio Return Channel), providing throughput up to 37 Mbit/s.
For older models of equipment, it may be necessary to use optical output (Toslink), which is still a reliable standard for transmitting compressed audio formats without interference.
- 🔌 HDMI ARC/eARC is the best choice for modern systems with 4K and Atmos support
- 🔴 Optical cable is a reliable alternative for systems without HDMI input
- 📶 Bluetooth - convenient for wireless soundbars, but can cause lag
Connecting via HDMI ARC: step-by-step instructions
This method allows you to not only transmit sound, but also control the theater volume from your TV remote, eliminating the need to use two different remotes. You will need a quality HDMI cable High Speed, capable of transmitting data in both directions.
It is important to connect the cable to the exact port on the TV that is marked ARC or eARC, otherwise the audio return function will not work. Typically this connector is located next to the USB ports or in the bottom row of interfaces.
On your receiver or soundbar, select the input HDMI OUT (TV-ARC) or TV OUTso that the system understands where the sound needs to be taken from.
⚠️ Warning: Do not use cheap cables from unknown manufacturers, as they often cannot handle the high bandwidth required for formats DTS-HD And TrueHD.
- HDMI ARC
- Optical
- Air (Bluetooth)
- I don't know
Setting up optical output and digital audio
If you can't use HDMI, an optical cable is a great alternative, completely isolating the audio signal from electromagnetic interference. This type of connection physically transmits sound in the form of light pulses, which ensures that there is no interference from power cables.
In the TV menu you need to go to the section Sound → Output to audio system and switch the signal type to PCM or Auto depending on the capabilities of your receiver.
Sometimes you need to manually disable the TV's built-in speakers so that the sound goes exclusively to the external system, otherwise you will hear echo.
- 🔊 Make sure the protective plastic cover is removed from the end of the optical cable
- 📉 Do not bend the optical cable at a sharp angle, this may damage the fiber
- ⚙️ Enable optical output in settings if it is not active by default
Wireless technologies and their limitations
Connection via Bluetooth It is attractive due to the absence of unnecessary wires, but it has its own technical nuances that can spoil the impression of watching dynamic scenes. The main problem is synchronization delay (latency), when the sound is ahead or behind the picture.
Modern standards aptX Low Latency And LDAC minimize this gap, but older TV models may not support these codecs, producing a standard delay of 150-200 milliseconds.
Bluetooth is great for music, but for movies with lots of dialogue and effects, it's better to use a wired connection.
How to check audio delay?
Play a video with clear sounds (such as drumming or beating) and try to visually synchronize them with your heart rate. If the sound comes after the impact, the delay is critical.
Audio interface comparison table
For clarity, we will compare the main characteristics of various connection methods so that you can choose the best option for your configuration.
| Interface | Max. quality | Volume control | Delay |
|---|---|---|---|
| HDMI eARC | Surround (Atmos, DTS:X) | Yes (CEC) | Minimum |
| HDMI ARC | Compressed 5.1/7.1 | Yes (CEC) | Low |
| Optics (Toslink) | Compressed 5.1 | No | Average |
| Bluetooth | Stereo / Compressed 5.1 | Depends on model | High |
Troubleshoot common problems
If you do not hear sound after connecting, check whether the function is activated HDMI CEC (Consumer Electronics Control) in the settings of both devices. Without this function, the TV may not understand that an external system is connected to it.
A common mistake is selecting the wrong audio output format in the TV menu when the device is trying to send a signal Dolby TrueHD through an interface that does not support it.
Try rebooting both devices by unplugging them for 30 seconds to reset the settings cache and reconnect the communication protocols.
☑️ Connection check
Specific settings for game consoles
When connecting a game console such as PlayStation 5 or Xbox Series X, it's important to consider that audio often travels through the console rather than directly from the TV. In this case, the HDMI cable must go from the console to the receiver, and from the receiver to the TV.
This allows audio to be processed directly in A/V receiver, obtaining maximum quality without loss when passing through the television receiver.
If your console is connected directly to your TV, make sure your device settings are set to output audio to an external system via ARC.
If the sound is interrupted or distorted, try replacing the HDMI cable with a shielded one with ferrite beads to protect against interference.
Final sound calibration
After the physical connection, you need to adjust the volume and balance levels so that the sound is natural. Many modern systems have an automatic calibration feature that uses a microphone to analyze the acoustics of the room.
Manual tuning allows you to fine-tune the sound to suit your preferences, adjusting the bass and treble through equalizer on the cinema control panel.
Don't forget to check the volume on the TV itself - sometimes it is set to minimum or turned off by software, even if the sound is transmitted to an external device.
⚠️ Attention: When using a Bluetooth connection, be sure to check the battery level of the wireless speakers, as discharge may occur at the most inopportune moment.
The correct choice of interface and audio output format in the menu is 90% of success when setting up a home theater.
The future of audio systems: what awaits us next
Technologies are developing rapidly, and soon we will see mass implementation WiSA and other wireless standards capable of transmitting uncompressed multi-channel audio without delay.
The integration of artificial intelligence will allow systems to automatically adjust sound to the type of content and room acoustics in real time.
In the meantime, competent use of available interfaces HDMI And Optical remains the key to quality home cinema.
Why doesn't sound work through HDMI ARC?
Most often, the problem lies in the CEC function being disabled in the TV settings or using a cable that does not support the High Speed standard. Try replacing the cable and checking the menu settings.
Is it possible to connect a cinema to an old TV without HDMI?
Yes, if the TV has an optical output (Toslink) or analog outputs (RCA/3.5mm). In this case, you will need the appropriate cable and PCM format setting in the menu.
How to remove sound delay when watching via Bluetooth?
You can reduce latency by switching your TV and speakers to the aptX Low Latency codec, if they support it. Otherwise, it is better to use a wired connection.
Do I need a separate amplifier for passive speakers?
If your home theater consists of passive speakers, then yes, you need a separate AV receiver that will amplify the signal before sending it to the speakers.