What happens when you switch your TV’s audio output to “Raw Audio”? Many viewers see this option in their settings but aren’t sure what it does or when to use it. The term sounds technical, but understanding it can change the way you experience sound at home.
If you care about audio quality, home theater setups, or just want to avoid sound problems, learning about raw audio on TV is essential.
Let’s break down what raw audio means, why it matters, and how it can impact your TV experience. Along the way, we’ll look at how different audio formats work, which devices support raw audio, common issues, and practical tips. Whether you’re a casual watcher or a home theater enthusiast, you’ll find clear answers here.
What Does Raw Audio On Tv Mean?
When you see “raw audio” as a setting on your TV or soundbar, it refers to the way your television sends audio data to another device, such as a sound system or AV receiver. In simple terms, raw audio means the TV passes the audio signal untouched, without decoding or processing it.
Instead of converting the sound into standard stereo or another format, the TV sends the original digital stream (such as Dolby Digital, DTS, or PCM) straight to your connected audio device. That device is then responsible for decoding and playing the sound.
This is often called bitstream audio or pass-through audio in manuals and settings. The goal is to keep the audio as pure as possible until it reaches the device best equipped to handle it.
Example Scenario
Imagine you’re watching a Blu-ray movie with 5. 1 surround sound. If your TV is set to raw audio and connected to a surround receiver, the full multi-channel experience is passed to your receiver, which decodes it and plays sound from all speakers.
If the TV decoded it first (instead of using raw audio), you might only get stereo sound, losing the immersive effect.
How Tvs Handle Audio Signals
To understand raw audio, you need to know how TVs manage sound internally. Modern TVs support several audio processing modes:
- PCM (Pulse Code Modulation): The TV decodes the digital audio stream and sends it as uncompressed stereo or multichannel PCM. This is compatible with almost all sound systems but may not support advanced surround sound formats.
- Bitstream/Raw/Pass-through: The TV sends the original audio stream (Dolby, DTS, etc.) To your receiver. The TV does not decode or change the audio.
- Downmix to Stereo: The TV converts any audio to standard two-channel stereo. Useful for basic speakers, but loses surround effects.
The main difference is who does the decoding—the TV or an external device. With raw audio, your sound system or AV receiver gets the “raw” data, so you need compatible equipment to hear the best sound.
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Common Audio Formats Supported By Raw Audio
When your TV is set to raw audio, it can pass several types of digital audio formats. Each has unique features and requirements.
Dolby Digital (ac-3)
Dolby Digital is one of the most common surround sound formats. It supports up to 5.1 channels (front, center, surround, and subwoofer). Most streaming services, Blu-ray discs, and TV broadcasts use this format.
Dts (digital Theater Systems)
DTS is similar to Dolby Digital and supports 5.1 or even 7.1 surround sound. Some Blu-ray discs and streaming services use DTS for higher bitrates and quality.
Dolby Truehd And Dts-hd Master Audio
These are lossless formats found on Blu-ray discs. They deliver studio-quality sound but require compatible receivers and HDMI connections.
Pcm
PCM is uncompressed audio. When using raw audio, some TVs can send multi-channel PCM, but most limit PCM to stereo unless you use HDMI ARC or eARC.
Dolby Atmos And Dts:x
These formats add height channels for 3D audio. They need HDMI eARC to pass the full signal from the TV to the receiver or soundbar.
Comparison Table: Audio Formats And Raw Audio Compatibility
Here’s how raw audio pass-through compares for different formats and connection types:
| Audio Format | Supports Raw Audio | Needs HDMI ARC/eARC | Maximum Channels |
|---|---|---|---|
| Dolby Digital | Yes | No | 5.1 |
| DTS | Yes | No | 5.1 |
| Dolby TrueHD | Yes | Yes (eARC) | 7.1 |
| DTS-HD Master Audio | Yes | Yes (eARC) | 7.1 |
| Dolby Atmos | Yes | Yes (eARC) | Up to 7.1.4 |
| PCM | Limited | Yes (multi-channel) | Stereo/7.1 |
Why Use Raw Audio On Tv?
Many people wonder why they should use raw audio instead of letting the TV handle everything. There are several important reasons:
Better Sound Quality
Raw audio lets your sound system or AV receiver do the decoding. These devices are built for high-quality audio, with better DACs (digital-to-analog converters) and more power than a TV’s speakers. This means richer, more detailed sound.
Full Surround Sound
If you want real surround sound (like 5.1 or 7.1), raw audio is necessary. Most TVs can only output stereo after decoding, so you lose the surround experience unless the original signal is passed through.
Support For Advanced Formats
Features like Dolby Atmos and DTS:X are only possible when the raw signal is sent to a compatible device. TVs rarely decode these advanced formats themselves.
Avoiding Audio Sync Problems
Sometimes, if the TV decodes audio, it can cause a delay (lip sync problems) between the sound and the picture. Raw audio pass-through usually reduces this risk, since the receiver processes both audio and video together.
Flexibility For Upgrades
If you upgrade your sound system in the future, raw audio ensures you get the most out of new features without changing TV settings.
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When Should You Not Use Raw Audio?
Raw audio is not always the best choice. There are situations where it may cause problems:
- No External Sound System: If you only use the TV’s built-in speakers, raw audio won’t help. Most TVs can’t decode surround formats themselves for their own speakers.
- Incompatible Devices: If your receiver or soundbar doesn’t support the format being passed, you might hear nothing or just noise.
- Old Connections: Optical and coaxial cables can’t carry newer formats like Dolby Atmos. HDMI ARC or eARC is needed for these.
- Accessibility Needs: Some accessibility features (like audio descriptions or sound leveling) may not work if the audio is not decoded by the TV.
How To Enable Raw Audio On Your Tv
Every TV brand uses different menus, but the general process is similar:
- Go to your TV’s Settings menu.
- Find Audio or Sound Output.
- Choose your output device (HDMI ARC, Optical, etc. ).
- Look for Audio Format, Digital Output, or Pass-through.
- Select Raw, Bitstream, or Pass-through (names vary).
Your connected soundbar or AV receiver must also be set to accept the correct input.
Example: Samsung Tv
On many Samsung TVs:
- Settings > Sound > Expert Settings > Digital Output Audio Format > Choose “Bitstream” (for raw audio).
Example: Lg Tv
On LG TVs:
- Settings > All Settings > Sound > Sound Out > HDMI ARC > Digital Sound Out > “Pass Through”.
If you’re unsure, check your TV manual or the manufacturer’s website.
Raw Audio Vs Pcm: What’s The Difference?
Many people confuse raw audio and PCM. Here’s how they differ:
- Raw Audio / Bitstream: Sends the original, compressed digital audio (Dolby, DTS, etc.) Untouched to the receiver. The receiver decodes it.
- PCM: TV decodes the signal and sends it as uncompressed audio (usually stereo, sometimes multi-channel). The receiver just amplifies and plays it.
When To Use Pcm
If your AV receiver or soundbar does not support Dolby or DTS, use PCM. This way, the TV does the decoding, and you’ll still hear the sound. But you may lose surround effects.
Comparison Table: Raw Audio Vs Pcm
| Feature | Raw Audio (Bitstream) | PCM |
|---|---|---|
| Decoding Device | Receiver/Soundbar | TV |
| Supported Formats | Dolby, DTS, Atmos, etc. | Stereo/Some multichannel |
| Audio Quality | Original (can be lossless) | Uncompressed |
| Best Use Case | Home theater systems | Basic soundbars/TV speakers |
Home Theater Setups: Getting The Best From Raw Audio
If you’re building a home theater or using a soundbar, raw audio can deliver the best experience—but only if all your equipment is set up correctly. Here’s what you need to know:
Hdmi Arc Vs Earc
- HDMI ARC (Audio Return Channel) allows TVs to send audio to receivers or soundbars over HDMI. It supports Dolby Digital and DTS, but not the highest-quality formats.
- HDMI eARC (enhanced ARC) supports all modern audio formats, including Dolby Atmos and DTS: X. If your TV and receiver both have eARC, always use it for raw audio.
Optical And Coaxial
These older cables can pass Dolby Digital and DTS (5. 1), but not the new lossless or 3D formats. For most modern home theaters, HDMI is better.
Soundbars
Many soundbars support raw audio, but only if connected via HDMI. If using optical, you may lose advanced formats. Some soundbars fake surround sound from stereo input, so check your model’s specs.
Av Receivers
Receivers are designed for raw audio. Make sure your receiver’s firmware is up to date, so it can decode the latest formats.
Device Compatibility Table
Not all devices handle raw audio the same way. This table shows how different devices interact with raw audio settings:
| Device Type | Supports Raw Audio Pass-through | Best Connection Type | Advanced Formats Supported |
|---|---|---|---|
| TV Built-in Speakers | No | — | No |
| Soundbar (HDMI ARC) | Yes | HDMI ARC/eARC | Dolby Digital, DTS, Atmos* |
| AV Receiver | Yes | HDMI eARC | All formats |
| Bluetooth Speakers | No | Bluetooth | No |
| Optical Receiver | Limited | Optical | Dolby Digital, DTS |
*Atmos support depends on the soundbar model.
Common Problems When Using Raw Audio
Even experienced users run into issues when using raw audio. Understanding these can save you time and frustration.
No Sound Output
If you select raw audio but your receiver or soundbar does not support the format, you may get no sound at all. For example, if a movie uses DTS and your soundbar only supports Dolby Digital, you’ll hear nothing.
Tip: Always match your equipment’s supported formats. Check both TV and audio device manuals.
Audio And Video Out Of Sync
Sometimes, audio lags behind video. This is called lip sync error. It can be caused by slow decoding in the receiver. Most receivers have a setting to adjust audio delay.
Tip: Use HDMI eARC for the fastest, most reliable sync.
Volume Control Not Working
With raw audio, your TV may not control the receiver’s volume. You have to use the receiver or soundbar’s remote instead.
Tip: Some systems support HDMI CEC, letting your TV remote adjust receiver volume. Enable CEC in both devices’ settings.
Incomplete Surround Sound
If you only hear stereo sound, check:
- Is the content in surround format?
- Is your TV set to raw/bitstream?
- Is your receiver set to the correct input mode?
Non-obvious insight: Some streaming apps downmix audio to stereo on certain TV models, even with raw audio enabled. Test with a Blu-ray player or game console to confirm.
Practical Tips For The Best Raw Audio Experience
Getting the most from raw audio takes more than just flipping a setting. Here are practical ways to maximize your setup:
- Update Firmware: Both TVs and receivers get updates for new formats and bug fixes. Check for updates regularly.
- Use High-Quality HDMI Cables: Cheap or old HDMI cables can cause signal loss. For eARC, use “High Speed” or “Ultra High Speed” HDMI cables.
- Set TV and Receiver to Match: Both devices must use compatible settings. If your TV is set to raw but the receiver is set to PCM, you may not hear sound.
- Check Streaming App Settings: Some apps (like Netflix) let you choose audio output. Pick “English (5.1)” or “Dolby Atmos” if available.
- Test with Different Content: Not all movies and shows have surround sound. Use known test clips to verify your system.
- Look for Output Indicators: Many receivers and soundbars have lights or display text showing “Dolby Digital”, “DTS”, or “Atmos” when receiving raw audio.
Non-obvious insight: Sometimes, external devices (like streaming sticks or game consoles) have their own audio output settings. Set them to “Bitstream” or “Auto” for best results.
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The Future Of Raw Audio On Tvs
Audio technology is evolving quickly. As streaming services add more advanced audio, TVs and receivers must keep up. Here’s what to expect:
- HDMI eARC Adoption: More TVs and soundbars will support eARC, making it easier to pass the latest audio formats.
- Wireless Raw Audio: Some new systems use Wi-Fi to pass raw audio to speakers, reducing cables.
- Object-Based Audio: Formats like Dolby Atmos and DTS:X are becoming standard in movies and games, requiring raw audio for full effect.
- Smarter TV Audio: Future TVs may detect your connected devices and set the best audio output automatically.
If you want to stay ahead, choose devices with eARC and support for the latest formats.
Real-world Examples Of Raw Audio Use
Let’s look at some practical situations:
Watching A Movie
You have a 4K Blu-ray player connected to your TV, and a soundbar with HDMI eARC. Set your TV and player to raw audio/bitstream. The soundbar receives Dolby Atmos, giving you theater-quality sound.
Gaming
Modern game consoles (PlayStation 5, Xbox Series X) support 3D audio. If your TV is set to raw audio and connected to a receiver with eARC, you’ll hear the full surround sound as the game developer intended.
Streaming
If you watch Netflix or Disney+ and your TV and receiver support Dolby Atmos, enable raw audio. Choose Atmos audio in the streaming app for the best experience.
Music
High-resolution music files (like FLAC or WAV) played through a media player can be passed as raw audio to a compatible receiver, offering higher fidelity than standard streaming.
Troubleshooting Checklist For Raw Audio Problems
If something isn’t working, try these steps:
- Check that your TV output is set to raw/bitstream/pass-through.
- Confirm your receiver or soundbar supports the audio format.
- Use HDMI ARC/eARC for advanced formats.
- Test with known surround sound content.
- Update firmware on all devices.
- Try a different HDMI cable.
- Set external devices (Blu-ray, game console) to bitstream output.
- Enable CEC if you want TV remote volume control.
Frequently Asked Questions
What Is The Difference Between Raw Audio And Bitstream?
Raw audio and bitstream are often used to mean the same thing. Both send the original, unprocessed digital audio signal from the TV to a receiver or soundbar. The receiving device then decodes and plays the audio.
Do I Need A Special Cable For Raw Audio?
For basic formats like Dolby Digital or DTS, an optical or HDMI cable works. For advanced formats (Dolby Atmos, DTS:X), you need an HDMI eARC connection and a quality HDMI cable, such as “Ultra High Speed”.
Why Don’t I Hear Sound When I Select Raw Audio?
This usually means your sound system doesn’t support the format being sent. For example, if your movie uses DTS but your soundbar only supports Dolby, you’ll get silence. Set your TV to PCM or use compatible equipment.
Can I Use Raw Audio With Bluetooth Speakers?
No. Bluetooth only supports compressed stereo audio. It cannot carry raw multichannel audio like Dolby or DTS. For surround sound, use wired connections such as HDMI.
Does Raw Audio Improve Streaming Quality?
Raw audio enables your sound system to play the highest quality audio the streaming service offers, such as Dolby Atmos. However, it won’t improve poor source material. Always select the best audio track in your streaming app if available.
For more technical details on raw audio standards, visit Wikipedia’s Bitstream entry.
Raw audio may sound complicated at first, but it is the key to unlocking true home theater sound. With the right setup and a little know-how, your TV can deliver an audio experience that rivals the cinema. Check your devices, try these tips, and enjoy every detail your favorite content has to offer.