A modern home theater is not only a TV with powerful acoustics, but also an entertainment center that can transform movie watching, music streaming and even gaming sessions. Connecting a computer to such a system provides access to a huge media library, online services and games in the format 4K HDR with surround sound. However, many users encounter problems: there is no image, the sound comes only through the PC speakers, or the picture is “blurred” on the big screen.

In this article we will look at all current connection methods - from the classic HDMI before wireless technologies like Miracast And AirPlay, and we’ll also tell you how to properly set the screen resolution, synchronize sound and avoid delays. We will pay special attention compatibility of old receivers with new video cards (for example, the problem of lack of sound via HDMI on NVIDIA RTX 40-series when connected to receivers before 2018). Ready to turn your PC into a full-fledged media center? Let's start by choosing the optimal connection method.

1. Select connection method: wired vs. wireless

The first question to decide is whether to use cables or do without them. Wired connections (HDMI, DisplayPort, DVI) guarantee stability, minimal delays and maximum picture quality (up to 8K@60Hz), but limit mobility. Wireless technologies (Wi-Fi Direct, Bluetooth, Chromecast) are convenient for a temporary connection, but may suffer from lags and loss of quality.

Key selection criteria:

  • 🎮 For gamers and movie buffs: only HDMI 2.1 or DisplayPort 1.4 (support 4K@120Hz, VRR, ALLM).
  • 🎵 For music and presentations: enough HDMI 1.4 or wireless Bluetooth 5.0 (codecs aptX HD, LDAC).
  • 📱 For streaming from a laptop: Miracast (built into Windows 10/11) or Apple AirPlay (for ecosystem Mac/iPhone).
  • 💰 Budget option: HDMI 1.4 + adapter 3.5 mm → RCA for sound (if the receiver does not support HDMI-ARC).

It is important to consider home theater configuration. If you have a separate AV receiver (For example, Denon AVR-X2700H or Yamaha RX-V4A), it is better to organize the connection through it - this will allow you to use all the sound processing functions (for example, Dolby Atmos or DTS:X). If the cinema is built on the basis soundbar (let's say Sony HT-A5000), you can connect directly to your TV.

📊 Which connection type do you prefer?
  • Wired (HDMI/DisplayPort)
  • Wireless (Wi-Fi/Bluetooth)
  • I don't know, I'll decide after reading it
  • I use both options

2. Wired connection via HDMI: step-by-step instructions

HDMI remains the most universal and reliable method. Modern video cards (NVIDIA RTX 30/40, AMD Radeon RX 6000/7000) and processors with integrated graphics (Intel Arc, AMD Ryzen 5000G/7000G) support HDMI 2.1, which allows you to transmit video 4K@120Hz and sound Dolby TrueHD one cable.

To connect:

  1. Turn off your computer and home theater (TV/receiver).
  2. Connect the ports HDMI OUT on PC and HDMI IN on the receiver/TV. For AV receivers use the port marked ARC/eARC (For example, HDMI 1 on Sony STR-DH790).
  3. Turn on the devices and select the appropriate signal source on the cinema remote control (button Source or Input).
  4. On PC, click Win + P and select mode Duplicate or Second screen only.

If the image does not appear:

  • 🔌 Check that the cable supports the correct version HDMI (for example, for 4K@60Hz needed High Speed HDMI with a bandwidth of 18 Gbit/s).
  • 🖥️ Update your video card drivers (via GeForce Experience, AMD Adrenalin or manufacturer's website).
  • 🔊 Make sure the correct output is selected in Windows sound settings: Right click on the speaker icon → Open sound options → Output → HDMI.

The cable is connected to the HDMI OUT port on the PC and HDMI IN on the receiver/TV|

The correct input source has been selected on the cinema remote control|

Video card drivers updated to latest version|

In Windows settings, the display mode is set to "Second screen only"|

Default audio device is HDMI audio -->

An important nuance for owners of discrete video cards: if you have NVIDIA or AMD, sound by HDMI transmitted through the GPU, not through the motherboard. Therefore in Device Manager The audio device from the video card manufacturer should be displayed (for example, NVIDIA High Definition Audio). If it is not there, reinstall the drivers using the "Clean Install" option.

What to do if the sound comes only through the PC speakers?

This problem often occurs when connecting to receivers older than 2015 that do not support modern audio formats via HDMI. Solutions:

1. In the NVIDIA/AMD Control Panel, disable the "Digital Audio Output" option and select the format PCM instead of Bitstream.

2. Use a separate cable TOSLINK (optics) or 3.5 mm → RCA for sound.

3. Update the receiver firmware (for example, for Onkyo TX-NR696 this solves the problem with Dolby Digital Plus).

3. Video settings: resolution, refresh rate, HDR

After successful connection, you need to optimize the image parameters. Incorrect settings can lead to a “soapy” image, stuttering or lack of HDR.

Open Windows Settings → System → Display → Advanced display options and check:

  • 📺 Resolution: must match the native resolution of the TV (for example, 3840×2160 for 4K TV). Don't use non-standard values like 1360×768 - this will lead to artifacts.
  • 🔄 Refresh rate: enough for movies 24 Hz, for games - 60 Hz or 120 Hz (if supported). On LG OLED C2 turn on the mode Game Optimizer for minimal input lag.
  • 🌈 Color profile: for HDR select HDR10 or Dolby Vision (if your TV supports it). In drivers NVIDIA this is configured in NVIDIA Control Panel → Display → Color Settings.

It's critical for gamers to include:

Parameter Where to enable Why is it needed?
VRR (Variable Refresh Rate) TV settings (Picture → Game → VRR) + GPU driver Eliminates tearing without increasing input lag
ALLM (Auto Low Latency Mode) TV settings (General → HDMI Mode → Game) Automatically switches the TV to low latency mode
4:4:4 Chroma GPU Driver (NVIDIA Control Panel → Resolution → Color Output) Full color reproduction without artifacts (important for text and interface)
Dolby Vision Gaming TV settings (Picture → Dolby Vision → Game) HDR with dynamic lighting for gaming (available on LG CX/G2, Sony X95J)

Warning to Owners AMD Radeon:

⚠️ When connected to TVs Samsung QLED (series QN90B, QN85C) there may be no sound in the mode 4K@120Hz. Solution: in Radeon Software turn off Radeon Super Resolution and set the refresh rate 60 Hz for sound transmission.

4. Audio connection: HDMI ARC, optical cables, Bluetooth

The sound quality in a home theater depends not only on the acoustics, but also on the method of transmitting the audio signal. Let's consider all the options:

1. HDMI ARC/eARC (Audio Return Channel)

The most modern way is to transmit sound using the same HDMI- the same cable as the video. eARC (improved version) supports formats Dolby Atmos, DTS:X And 7.1 PCM without loss. To activate:

  • Connect a PC to the port HDMI IN on the receiver, and the receiver to the port HDMI ARC on TV.
  • In TV settings, enable HDMI Control And ARC Mode (for example, on Samsung QN90C: Settings → Sound → Expert Settings → HDMI Input Format).
  • On Windows, select your audio device AV receiver (HDMI).

2. Optical cable (TOSLINK)

If HDMI ARC does not work (for example, on old receivers Pioneer VSX-920), use optical cable. He transmits Dolby Digital 5.1 And DTS, but does not support Atmos or TrueHD. Connect:

  • 🔌 TOSLINK from PC (port on motherboard or video card) to port Optical In on the receiver.
  • 🎛️ On Windows, select your device Digital Audio (S/PDIF).

3. Bluetooth and Wi-Fi

Suitable for wireless audio transmission:

  • 🎧 Bluetooth 5.0+: codec aptX HD (for Android) or AAC (for iPhone/Mac). Latency ~100 ms - suitable for music, but not for movies.
  • 📶 Wi-Fi Direct: protocols DLNA or AirPlay 2 (for Apple TV or HomePod). Latency ~50 ms.
💡

If the sound through HDMI ARC is interrupted, try disabling the "Allow apps to control the audio device" option in Windows settings (Settings → System → Sound → Device properties).

5. Wireless connection: Miracast, AirPlay, Chromecast

If laying cables is inconvenient, use wireless technologies. They are divided into two types:

  1. Screen mirroring (Miracast, AirPlay): The entire PC desktop is broadcast on TV.
  2. Content streaming (Chromecast, DLNA): Video/music only, no Windows interface.

Miracast (Windows 10/11)

Built-in function in Windows, works without additional devices if the TV supports Miracast (most models Samsung, LG, Sony after 2015). How to connect:

  1. On TV, turn on the mode Screen Mirroring (on LG: Settings → Networks → Miracast).
  2. On PC, click Win + K and select your TV.
  3. Confirm the connection on both devices.

Latency: ~100-150ms (not good for games, but ok for movies).

Apple AirPlay (for Mac/iPhone)

If you have Apple TV or TV with support AirPlay 2 (LG OLED 2019+, Samsung QLED 2018+), duplicate the screen like this:

  1. On Mac: Control Center → Screen mirroring.
  2. On iPhone/iPad: swipe down → Screen mirroring.

Latency: ~50–80ms (better than Miracast, but requires devices Apple).

Google Chromecast

A universal solution for streaming. Connect Chromecast to HDMI-TV port and stream content from the browser Chrome or applications (YouTube, Netflix):

  1. In your browser, click ⋮ → Broadcast.
  2. Select Broadcast tab (for screen duplication) or Broadcast file (for video).

Latency: ~200–300ms (video only, not gaming).

💡

For minimal latency when connecting wirelessly, use specialized adapters such as Eveo Air (latency ~30 ms) or IOGEAR Wireless 4K (supports 4K@60Hz).

6. Solving common problems

Even if the connection is correct, errors may occur. Let's look at typical scenarios and their solutions:

1. There is no image on the screen

  • 🔌 Check that the cable HDMI supports the required resolution (for example, for 4K@120Hz needed Ultra High Speed HDMI).
  • 🖥️ Restart your PC with the cable connected - sometimes Windows does not recognize the new display when hot plugging.
  • 🔄 Press the button on the TV remote control Source and choose the right one HDMI-port.
  • 🛠️ B Device Manager check that the video card is displayed without an exclamation mark. If so, update the drivers.

2. The sound comes through the PC speakers, not through the cinema

  • 🎛️ On Windows: Right click on the speaker icon → Open sound options → Output → Select HDMI device.
  • 🔊 B NVIDIA Control Panel: Display → Digital Audio Setup → Enable.
  • 🔄 If used AMD, in Radeon Software check that it is turned on HDMI Audio.

3. The picture “twitches” or there are artifacts

  • 📺 Reduce resolution to 1920×1080@60Hz and check if the problem goes away.
  • 🔌 Try another one HDMI-cable (the current one may be damaged).
  • 🖥️ In GPU settings, disable G-Sync or FreeSync - they may conflict with signal processing on TV.

4. No Dolby Atmos sound

  • 🎵 Make sure your receiver supports Atmos (For example, Denon AVR-X3700H or Marantz SR6015).
  • 🔊 On Windows: Settings → System → Sound → Device properties → Default format → Dolby Atmos for home theater.
  • 📺 In TV settings, turn on Passthrough for HDMI (for example, on Sony X90J: Settings → Sound → HDMI → eARC Mode → Passthrough).
What to do if the TV does not see the PC via Miracast?

1. Make sure both devices are connected to the same Wi-Fi network (even if Miracast works without the Internet, some TVs require this).

2. On a PC, run at the command line:

netsh wlan set hostednetwork mode=allow

netsh wlan start hostednetwork

3. Update the wireless adapter drivers (especially important for laptops with Intel AX200/AX210).

4. On TV, turn off the energy saving mode for Wi-Fi (Settings → Networks → Power saving mode → Off.).

7. Optimized for games, movies and music

PC and theater settings must adapt to the type of content. Here are recommendations for different scenarios:

For games (PC, consoles)

  • 🎮 Turn it on TV Game Mode (disables post-processing, reduces input lag to 10–15 ms).
  • 🖥️ In drivers NVIDIA/AMD activate G-Sync/FreeSync (if supported).
  • 🔊 Set the sound to 5.1 PCM (less delays than with Bitstream).

For movies (4K HDR, Dolby Vision)

  • 🎬 Turn on TV mode Cinema or Movie (turns off the backlight, expands the color gamut).
  • 🖥️ In Windows, set the color profile BT.2020 and color bits 10/12 bit.
  • 🎵 Select sound format Dolby TrueHD or DTS-HD MA (if the receiver supports it).

For music (FLAC, DSD)

  • 🎵 Use USB-DAC (For example, Topping D50s) to connect to the receiver - this will give better quality than HDMI.
  • 🖥️ In audio player (Foobar2000, Audirvana) select exit WASAPI or ASIO to bypass the system mixer.
  • 🔊 Adjust the equalizer in the receiver to suit the genre of music (for example, turn off Dynamic EQ for classics).
💡

For perfect synchronization of audio and video in films, use the function AV Sync on the receiver (for example, on Yamaha RX-A2A this is configured in Menu → Audio → Lip Sync).

FAQ: Frequently asked questions

Is it possible to connect an old PC without HDMI to a modern cinema?

Yes, but you will need an adapter. Options:

  • DVI → HDMI: transmits only video (sound will have to be connected separately via 3.5 mm or optics).
  • VGA → HDMI: requires an active converter (for example, Portta PETVGA01), since the signals are analog and digital.
  • DisplayPort → HDMI: the most reliable option (the adapter costs ~500 rubles).

Use a separate cable for audio 3.5 mm → RCA or TOSLINK.

Why is there no sound on the receiver when connected via HDMI? Yamaha RX-V685?

This problem is typical for receivers Yamaha 2016–2019. Solutions:

  1. Update the receiver firmware (instructions: Yamaha official website).
  2. In Windows settings, select the audio format PCM 5.1 instead of Bitstream.
  3. In the receiver menu, enable HDMI Control And Audio Return Channel.

If that doesn't help, use an optical cable for audio.

How to reduce audio latency when connected wirelessly?

Delay (latency) depends on the technology:

  • Bluetooth: use codec aptX Low Latency (latency ~40 ms) or LC3 (in Bluetooth 5.2).
  • Wi-Fi (Miracast/AirPlay): Connect your PC and TV to the network 5 GHz (not 2.4 GHz).
  • Chromecast: turn on the mode Guest Mode for direct connection without a router.

For games, it is better to use a wired connection or specialized adapters (Eveo Air, IOGEAR GWAVRKIT).

Is it possible to broadcast 4K HDR via Wi-Fi?

Technically yes, but with caveats:

  • Miracast: maximum resolution - 1080p@60Hz (even on Windows 11).
  • AirPlay 2: supports 4K HDR, but only on Apple TV 4K or TVs with AirPlay 2 (LG C2, Sony X95K).
  • Chromecast Ultra/Google TV: broadcasts 4K HDR, but with compression (quality loss is noticeable on large screens).

For a complete 4K HDR use without loss HDMI 2.1.

How to connect a laptop with USB-C to the cinema?

Modern laptops (MacBook Pro, Dell XPS, HP Spectre) often have only USB-C/Thunderbolt. Connection options:

  • USB-C → HDMI: adapter (eg Anker 565) for video + audio.
  • Thunderbolt 3/4: supports 4K@120Hz And 8K@60Hz through USB-C (need cable Thunderbolt → HDMI 2.1).
  • Dock station (For example, CalDigit TS4): connects simultaneously HDMI, DisplayPort and audio.

For MacBook You may need to manually adjust the resolution in System settings → Monitors.