What Is An HDMI Audio Extractor?

Having determined that we use HDMI to transmit audio and video through one cable, what does an HDMI Audio Extractor do?

As you might have guessed from the title, you use it to split the audio and video signals. It basically extracts and redirects your audio signal. This can be directed either to a digital or an analog source and allows you to play your audio using a separate device.

The HDMI Audio Extractor will allow you to seamlessly integrate your digital home theatre system and your home sound system together.

Why Do You Need One?

If you want to convert HDMI into analog or another format, you will need an extractor. HDMI transmits a digital signal. So, sending it to an analog system would not produce a usable signal. Therefore, whenever you want to convert an HDMI signal to audio-only, you will need an HDMI Audio Extractor.

Is The Sound Quality Affected?

There are some instances where the sound can be degraded, but they are most likely not caused by the extractor. Some things that can affect the quality of the audio are:

Sample Rate.
The HDMI version your devices support.
Cable length.

Let’s take a quick look at a few of these scenarios; the most critical element is the sample rate…

The Effect Of The Sample Rate

The higher the sample rate, the better. If you have a lower sample rate, it can have two effects.

The overall sound can be less defined.
It might not reproduce some of the higher frequencies.

Since it was created, HDMI has used the same sample rate. However, its design does allow for sample rate specifications to vary according to the device.

Therefore, the rule of the weakest link will apply. Your sound quality will be controlled by the device with the least capability in the chain. This might, or it might not be the extractor. And it will depend to a great extent on which version of HDMI your devices support.

The Length of The Signal Path

Or, to put it another way, the length of your cable. This might seem irrelevant to some in our high-tech age, but it affects sound quality. Let’s take a brief look at why.

When two HDMI devices link up, they perform what is known as a “digital handshake.” Information is shared between the two participants. This will establish the connection parameters and capabilities. One of these parameters is the sample rate.

Time From Output to Input

Devices are designed to operate at a given sample rate. But the length of the cable linking them up can vary the output to the input travel time that is required.

Each device has an internal clock that will time the transfer rate. At the point of the “handshake,” they communicate, and a sample rate is determined. However, longer cables can mean a degraded signal which will mean a loss of sound quality.

There Doesn’t Need to Be A Loss In Quality

It is usually a practical exercise. If you only need four of five feet of cable for the connection, that is what you should use. If you use twenty feet, then you are creating problems for yourself, apart from the amount of cabling lying around.

It is not how close the devices are together but the amount of connection material (the cabling) involved. If you use the right amount of cable, then you should be able to enjoy some good quality sound.

Choosing Your Extractor

You will find that the latest audio extractors use HDMI 2.0. There are newer versions, of course, as there always are. As with all audio equipment, there are budget ranges, and some come with a heftier price. The cheaper models usually only give you stereo sound.

If you want an HDMI extractor for a 5.1 or 7.1 system, it is going to cost more. Plus, you will need some extra cabling to connect it all up. And when choosing your extractor, make sure you have a compatible output format.

Here are some examples of some great products that are currently available…

Building a Sound System at Home?

We can help you find the components you need. Check out our in-depth reviews of the Best 7.1 Home Theater System, the Best High End Home Theater Speakers, the Best Wireless TV Speakers, the Best Smart Speakers, the Best Subwoofers for Music, and the Best Ceiling Speakers For Dolby Atmos you can buy in 2023.

You may also enjoy our detailed reviews of the Best Yamaha AV Receivers, the Best AV Receivers Under $500, and the Best AV Receivers Under $1000 currently on the market.

And don’t miss our handy guides on How HDMI ARC Works with Soundbars, Connect a Soundbar to TV Without HDMI or Optical, and Soundbar HDMI vs Optical for more helpful information.