If you are looking for a home theater or surround sound system, you might have come across the terms Dolby Atmos and Dolby Digital or would have searched Dolby Atmos vs Dolby Digital. These are two different audio formats that can enhance your movie-watching experience with realistic and immersive sound effects. But what are the differences between them and which one is better for your needs? In this article, we will compare and contrast Dolby Atmos and Dolby Digital, explain how they work, and help you decide which one is best for you.
What is Dolby Atmos?
Dolby Atmos is a newer technology that was introduced in 2012 by Dolby Laboratories. It is a surround sound format that supports object-based and high-resolution audio, meaning that it can create a three-dimensional sound field with sounds coming from above, below, and around you. Dolby Atmos requires special speakers that can fire sound upwards or downwards, or a soundbar that can bounce sound off the ceiling and walls. Dolby Atmos can be found on Blu-ray discs and 4K Ultra HD Blu-rays, as well as some streaming services like Netflix and Amazon Prime Video.
What is Dolby Digital?
Dolby Digital is an older technology that was introduced in 1997 by Dolby Laboratories. It is a surround sound format that supports up to 5.1 channels of audio, meaning that it can create a two-dimensional sound field with sounds coming from the front, center, and rear speakers. Dolby Digital does not require any special speakers or soundbars, as it can work with any standard home theater or surround sound system. Dolby Digital can also be found on Blu-ray discs and 4K Ultra HD Blu-rays, as well as some broadcast TV channels and DVDs.
Difference Between Dolby Atmos & Dolby Digital
The main difference between Dolby Atmos and Dolby Digital is the number and placement of speakers they support. Dolby Atmos can support up to 64 speakers, including overhead or upward-firing speakers that create a three-dimensional sound field. Dolby Digital can only support up to 5.1 speakers, which create a two-dimensional sound field with no height effects.
The secondary difference between Dolby Atmos and Dolby Digital is the audio quality and compression they use. Dolby Atmos supports object-based and high-resolution audio, which means that each sound can be individually placed and adjusted in the sound field. Dolby Digital uses channel-based and lossy audio, which means that each sound is assigned to a specific speaker and compressed to reduce the file size.
Furtherly based upon speaker channels, speaker types, speaker placement, speaker quality, speaker settings, audio quality, design and other descriptive features, here is detailed analysis of difference between Dolby Atmos & Dolby Digital:
Dolby Atmos
Speaker channels [Dolby Atmos]
Dolby Atmos supports up to 128 audio channels, but the most common configurations for home theater systems are 5.1.2, 5.1.4, 7.1.2, and 7.1.4. The first number indicates the number of traditional surround speakers (front, center, and rear), the second number indicates the number of subwoofers, and the third number indicates the number of height or overhead speakers.
Speaker type [Dolby Atmos]
Dolby Atmos requires speakers that can produce sound in three dimensions, either by using upward-firing drivers that reflect sound off the ceiling, or by using ceiling-mounted speakers that direct sound downward. Some soundbars also have built-in upward-firing speakers that can create a Dolby Atmos effect.
Speaker placement [Dolby Atmos]
Dolby Atmos speakers should be placed according to the guidelines provided by Dolby Labs. The front and center speakers should be at ear level, facing the listener. The surround speakers should be slightly above ear level, at an angle of 90 to 110 degrees from the center speaker. The subwoofer can be placed anywhere in the room, as long as it is not too close to a wall or corner. The height or overhead speakers should be aligned with the front and surround speakers, and angled downward at 45 degrees.
Speaker quality [Dolby Atmos]
Dolby Atmos speakers should have a wide frequency range, low distortion, and high sensitivity. They should also be able to handle high power levels without clipping or overheating. Some examples of high-quality Dolby Atmos speakers are the KEF R8 Meta, the Klipsch R-40SA, and the Fisual IC65.
Speaker settings [Dolby Atmos]
Dolby Atmos speakers should be calibrated using the setup menu of the A/V receiver or soundbar that supports Dolby Atmos decoding. The calibration process involves adjusting the speaker levels, distances, and crossovers to achieve a balanced and immersive sound field.
Other descriptive features [Dolby Atmos]
Dolby Atmos is a 3D surround sound technology that allows sounds to be placed anywhere in a 3D environment, creating a realistic and immersive audio experience. Dolby Atmos uses object-based audio, which means that each sound is treated as an individual object that can move independently of other sounds. Dolby Atmos also uses metadata to describe the location, movement, and characteristics of each sound object.
Audio quality [Dolby Atmos]
Dolby Atmos delivers high-quality audio that is dynamic, clear, and detailed. Dolby Atmos can support lossless audio codecs such as Dolby TrueHD and Dolby MAT, which preserve the original audio quality without any compression or degradation. Dolby Atmos can also enhance the audio quality of non-Atmos content by using upmixing algorithms that create height effects from stereo or surround sound sources.
Design [Dolby Atmos]
Dolby Atmos has a sleek and modern design that blends well with any home theater decor. Dolby Atmos speakers are usually compact and discreet, with minimal wires and cables. Dolby Atmos soundbars are also stylish and elegant, with slim profiles and LED indicators.
Dolby Digital
Speaker channels [Dolby Digital]
Dolby Digital supports up to 5.1 audio channels, which means that it can deliver surround sound with five speakers (front left, front right, center, rear left, and rear right) and one subwoofer. Some newer versions of Dolby Digital, such as Dolby Digital Plus and Dolby Digital EX, can support up to 7.1 audio channels by adding two more rear speakers or two side speakers.
Speaker type [Dolby Digital]
Dolby Digital does not require any special type of speakers to work, as long as they are compatible with the A/V receiver or soundbar that supports Dolby Digital decoding. Any standard surround sound speakers can be used for Dolby Digital playback.
Speaker placement [Dolby Digital]
Dolby Digital speakers should be placed according to the guidelines provided by Dolby Labs. The front left and right speakers should be at ear level, facing the listener at an angle of 22 to 30 degrees from the center speaker. The center speaker should be at ear level, directly in front of the listener. The rear left and right speakers should be slightly above ear level, at an angle of 110 to 120 degrees from the center speaker. The subwoofer can be placed anywhere in the room, as long as it is not too close to a wall or corner.
Speaker quality [Dolby Digital]
Dolby Digital speakers should have a good frequency range, low distortion, and high sensitivity. They should also be able to handle moderate power levels without clipping or overheating. Some examples of good Dolby Digital speakers are the Sony SS-CS5, the Polk Audio T15, and the Yamaha NS-6490.
Speaker settings [Dolby Digital]
Dolby Digital speakers should be calibrated using the setup menu of the A/V receiver or soundbar that supports Dolby Digital decoding. The calibration process involves adjusting the speaker levels, distances, and crossovers to achieve a balanced and surround sound field.
Other descriptive features [Dolby Digital]
Dolby Digital is a surround sound technology that delivers a cinematic audio experience and is commonly referred to as the ‘industry standard’ (primarily because Dolby Labs has been around longer than DTS). Dolby Digital uses channel-based audio, which means that each speaker is assigned a specific audio channel that contains a mix of sounds. Dolby Digital also uses compression to reduce the size of the audio data, which allows it to fit on various media formats such as DVDs, Blu-rays, and streaming services.
Audio quality [Dolby Digital]
Dolby Digital delivers good audio quality that is clear and dynamic. Dolby Digital can support lossy audio codecs such as Dolby Digital and Dolby Digital Plus, which reduce the audio quality to some extent but still maintain a high level of fidelity. Dolby Digital can also support lossless audio codecs such as Dolby TrueHD, which preserve the original audio quality without any compression or degradation.
Design [Dolby Digital]
Dolby Digital has a classic and simple design that is easy to use and set up. Dolby Digital speakers are usually black or silver, with minimal wires and cables. Dolby Digital soundbars are also compact and functional, with simple buttons and indicators.
Before making any final verdict, you also need to look into budget options, user friendliness, supportive codecs, Gaming console compatibility which is described in detail below:
Budget [Dolby Atmos vs Dolby Digital]
Dolby Atmos is generally more expensive than Dolby Digital, as it requires more speakers, a compatible A/V receiver or soundbar, and a suitable room layout. Dolby Atmos speakers can cost anywhere from $100 to $1000 per pair, depending on the brand, quality, and features. A Dolby Atmos A/V receiver or soundbar can also cost from $300 to $2000 or more. Additionally, you may need to install ceiling speakers or mount upward-firing speakers on your walls, which can add to the installation costs.
Dolby Digital, on the other hand, is more affordable and accessible, as it can work with any standard surround sound speakers and A/V receiver or soundbar that supports Dolby Digital decoding. You can find decent Dolby Digital speakers for as low as $50 per pair, and a Dolby Digital A/V receiver or soundbar for as low as $100. You also don’t need to worry about installing height or overhead speakers, as Dolby Digital only uses front, center, and rear speakers.
User friendliness [Dolby Atmos vs Dolby Digital]
Dolby Atmos is more complex and challenging to set up than Dolby Digital, as it requires careful speaker placement, calibration, and configuration. You need to follow the guidelines provided by Dolby Labs to ensure optimal performance and sound quality. You also need to make sure that your A/V receiver or soundbar has enough HDMI inputs and outputs to connect all your devices and speakers. Moreover, you need to check that your Blu-ray discs or streaming services support Dolby Atmos audio formats.
Dolby Digital is simpler and easier to set up than Dolby Atmos, as it only requires basic speaker placement, calibration, and configuration. You can use the setup menu of your A/V receiver or soundbar to adjust the speaker levels, distances, and crossovers. You also don’t need to worry about HDMI inputs and outputs, as most devices and speakers are compatible with Dolby Digital. Furthermore, you can find Dolby Digital audio formats on almost any Blu-ray disc or streaming service.
Supportive codecs [Dolby Atmos vs Dolby Digital]
Dolby Atmos supports a variety of audio codecs, both lossy and lossless. Some of the most common ones are:
- Dolby TrueHD: A lossless audio codec that preserves the original audio quality without any compression or degradation. It can support up to 7.1 channels of surround sound plus 4 height channels for Dolby Atmos.
- Dolby MAT: A lossless audio codec that encapsulates Dolby TrueHD audio in a MAT (Metadata-enhanced Audio Transmission) container. It allows for backward compatibility with older A/V receivers that don’t support Dolby TrueHD.
- Dolby Digital Plus: A lossy audio codec that reduces the audio quality to some extent but still maintains a high level of fidelity. It can support up to 7.1 channels of surround sound plus 4 height channels for Dolby Atmos.
- Dolby AC-4: A lossy audio codec that uses advanced compression techniques to deliver high-quality audio with low bandwidth requirements. It can support up to 7.1 channels of surround sound plus 4 height channels for Dolby Atmos.
Dolby Digital also supports a variety of audio codecs, both lossy and lossless. Some of the most common ones are:
- Dolby TrueHD: Same as briefed above.
- Dolby Digital: A lossy audio codec that reduces the audio quality significantly but still provides a decent surround sound experience. It can support up to 5.1 channels of surround sound.
- Dolby Digital EX: A lossy audio codec that extends Dolby Digital by adding one or two extra rear channels for 6.1 or 7.1 surround sound.
- Dolby Digital Plus: Same as described above.
Gaming console Compatibility [Dolby Atmos vs Dolby Digital]
Dolby Atmos is supported by some gaming consoles, such as the Xbox One X/Series X/Series S and the PlayStation 5 . However, not all games are compatible with Dolby Atmos, and some may require additional fees or subscriptions to enable it. Moreover, you need to have a compatible A/V receiver or soundbar that can decode Dolby Atmos signals from your gaming console.
Dolby Digital is supported by most gaming consoles, such as the Xbox One/Series X/Series S, the PlayStation 4/5, the Nintendo Switch, and others . Most games are compatible with Dolby Digital, and you don’t need to pay any extra fees or subscriptions to enable it. You also don’t need a special A/V receiver or soundbar to decode Dolby Digital signals from your gaming console.
Advantages & Disadvantages of Dolby Atmos & Dolby Digital
Dolby Atmos
Advantages
- Dolby Atmos provides a realistic and immersive audio experience that can deliver sound from every angle, including above.
- Dolby Atmos uses object-based audio, which means that each sound is treated as an individual object that can move independently of other sounds. This allows for precise positioning, movement, and characteristics of each sound object.
- Dolby Atmos supports a variety of audio codecs, both lossy and lossless, such as Dolby TrueHD, Dolby MAT, Dolby Digital Plus, and Dolby AC-4. These codecs can preserve the original audio quality or reduce the bandwidth requirements without compromising the fidelity.
- Dolby Atmos is adaptable and compatible with different form factors and devices, such as home theater systems, soundbars, headphones, gaming consoles, mobile phones, and tablets. Dolby Atmos can also enhance the audio quality of non-Atmos content by using upmixing algorithms that create height effects from stereo or surround sound sources.
Disadvantages
- Dolby Atmos is generally more expensive than Dolby Digital, as it requires more speakers, a compatible A/V receiver or soundbar, and a suitable room layout. Dolby Atmos speakers can cost anywhere from $100 to $1000 per pair, depending on the brand, quality, and features. A Dolby Atmos A/V receiver or soundbar can also cost from $300 to $2000 or more.
- Dolby Atmos is more complex and challenging to set up than Dolby Digital, as it requires careful speaker placement, calibration, and configuration. You need to follow the guidelines provided by Dolby Labs to ensure optimal performance and sound quality. You also need to make sure that your Blu-ray discs or streaming services support Dolby Atmos audio formats.
- Dolby Atmos is not widely supported by all content creators and distributors. While there are some Blu-ray releases and streaming services that offer Dolby Atmos tracks, not all movies and games are compatible with the technology. Some may require additional fees or subscriptions to enable it.
Dolby Digital
Advantages
- Dolby Digital is more affordable and accessible than Dolby Atmos, as it can work with any standard surround sound speakers and A/V receiver or soundbar that supports Dolby Digital decoding. You can find decent Dolby Digital speakers for as low as $50 per pair, and a Dolby Digital A/V receiver or soundbar for as low as $100.
- Dolby Digital is simpler and easier to set up than Dolby Atmos, as it only requires basic speaker placement, calibration, and configuration. You can use the setup menu of your A/V receiver or soundbar to adjust the speaker levels, distances, and crossovers. You also don’t need to worry about HDMI inputs and outputs, as most devices and speakers are compatible with Dolby Digital.
- Dolby Digital is widely supported by all content creators and distributors. You can find Dolby Digital audio formats on almost any Blu-ray disc or streaming service. Most games are compatible with Dolby Digital, and you don’t need to pay any extra fees or subscriptions to enable it. You also don’t need a special A/V receiver or soundbar to decode Dolby Digital signals from your gaming console.
Disadvantages
- Dolby Digital provides only 2-dimensional surround sound with no overhead effects, meaning less realistic and immersive than Dolby Atmos. It uses channel-based audio, which means that each speaker is assigned a specific audio channel that contains a mix of sounds. This limits the precision and movement of each sound object.
- Dolby Digital supports fewer audio codecs than Dolby Atmos, mostly lossy ones.
- Dolby Digital has a classic and simple design that is easy to use and set up, but it may lack some features and options that Dolby Atmos offers. For example, Dolby Digital does not have an object-based audio system like Dolby Atmos, which can create a more realistic and immersive audio experience by placing sounds anywhere in a 3D environment.
Which one to Buy? Dolby Atmos or Dolby Digital?
So the answer is Dolby Atmos because it is the latest technology designed to support modern acoustics, and will stay longer with you, meanwhile Dolby Digital will start getting vanished sooner or later. It may be a little costly, but it will serve the right purpose and will support all latest compatible gadetries. Good Luck!!
You may read our another article about Best Surround Sound System options for your living room before making any decision to buy one.
Dolby Atmos vs Dolby Digital – FAQs
Q: What is Virtual Atmos?
A: Virtual Atmos is a term that refers to the simulation of Dolby Atmos sound by using speakers that are all placed in front of the listener, such as in a soundbar. Now this technology is also being used in headphones