• operation manual
• HDSX TV Sound Optimizer
• USB 2.0 cable, USB-A plug to Micro-USB-B plug (50cm).
• Cable is located in the right inner wall of the packaging
• Cable TOSLINK (50 cm).
• Before using this cable, please remove the protective caps at both ends.
• Self-adhesive Velcro straps for attaching the device behind your TV
• 4 self-adhesive rubber feet for placing the device on a horizontal surface

You will find the included USB power cable in the right inner wall of the packaging.

To guarantee the best sound, we supply our Toslink cable with protective caps on both ends. This protects the optical fiber against dust. Please simply remove these caps before use.

1.) Before using the Toslink cable, please remove the protective caps on both sides and remove any existing HDMI (ARC) connection between the TV and the soundbar/sound system. This can block the Toslink connection being established.

2.) Connect the "Digital Audio Out/Optical" of the television, satellite receiver or other sound device to the TOSLINK IN of the HDSX TV Sound Optimizer. If you use a receiver as a sound source, we recommend setting its volume to around 95%. This gives the HDSX TV Sound Optimizer enough input level to fully optimize the sound. After successful installation, control the volume exclusively via the external speaker system in the signal chain behind the HDSX TV Sound Optimizer.

Connection TOSLINK IN/TOSLINK OUT: Connect the TOSLINK OUT of our device to the “Digital In/Optical” input of your soundbar, AV receiver, headphone amplifier or other sound receiving device.

Connection TOSLINK IN/ANALOG OUT: Connect the ANALOG OUT of our device to the “Analog In” input of the soundbar, AV receiver, headphone amplifier or other sound receiving device.

3.) Connect our device to a free USB port on your TV/receiver/set top box using the USB power cable provided. The HDSX TV Sound Optimizer will then automatically switch on and off with the device.

4.) Set the TV, set top box or other sound device’s internal sound settings to “PCM”, “PCM Stereo” or “Stereo”.

5.) Mute the TV's internal speakers. For the best sound, we recommend turning off all internal sound effects on the TV/receiver and connected speaker system.

Tip: Turn down your sound system and/or headphones before you activate the HDSX TV Sound Optimizer for the first time using the switches on the back. If you are listening to very quiet content, the volume may automatically increase.

After these installation steps, you will enjoy perfectly balanced TV sound with consistent volume and intelligible speech.

PCM stands for “Pulse Code Modulation”. This describes the uncompressed and uncoded digital sound. In other words: PCM offers the best sound quality because the audio data contains all the information from the original transmission/recording.

Setting the digital audio output on the Netflix app to PCM or stereo is the solution here.
1. Open the Netflix app.
2. Select a movie or TV show.
3. Select the Audio and subtitles option.
4. Change the Audio selection from Dolby Digital Plus 5.1 to Stereo.

For the best sound quality, the HDSX TV Sound Optimizer works in the uncompressed PCM audio format. Therefore, please set your TV or the device that plays the sound to this format in its internal sound settings. It is usually called “PCM” or “PCM 2.0” or “Stereo”.

Yes, that's what they're designed for. Both outputs output the optimized sound in lip-sync. So you can, for example, listen through a soundbar and headphones at the same time. If you're using headphones, we recommend a model with its own volume control, as we output a static audio signal on both outputs.

If you have a TV and a soundbar from the same manufacturer, you can of course control both devices together with the TV remote control if they are connected via Toslink. Manufacturers have different names for this function, also known as CEC. At the end of this article you will find the different names of the function by the manufacturers that we know of.

If your soundbar cannot be controlled with the TV remote control with a pure Toslink connection, here is our tip:

Additionally, connect your soundbar via its AUX IN connection (usually 3.5 mm mini jack format) in parallel to either the analog output of your TV or the ANALOG OUT of the HDSX TV Sound Optimizer.

Be sure to stick with the input source "Digital In" and do not use an HDMI cable in parallel, as this will interfere with the Toslink sound connection. According to the tip described above, your soundbar will now switch on automatically and together with your TV. Then set your desired volume using the soundbar's remote control. Since this will not change again reliably thanks to our device, you can usually put the soundbar's remote control aside. After you have switched off the TV later, your soundbar will also switch off automatically if it no longer receives a signal.

Name of the CEC control function by different manufacturers:

• LG: Sound Sync or Simplink
• Panasonic: VieraLink
• Samsung: Anynet or Anynet+
• Sony: Bravia Theatre Sync
• Pioneer and Onkyo: CEC

• TOSLINK has established itself as a digital audio interface across manufacturers. This means that the HDSX TV Sound Optimizer is compatible with the vast majority of TVs, soundbars, AV receivers and other loudspeaker and sound playback systems as well as headphone amplifiers.
• It was important to us to develop a device for everyone and therefore TOSLINK was the digital audio interface of choice. Compatible and simply plug and play.
• The process transmits digital audio data using light pulses through a fiber optic cable built into the cable. This sends pulses that are processed in the receiving device as binary code 0 and 1.
• In addition to the widespread implementation of the standard, TOSLINK is very susceptible to interference and does not emit any electromagnetic radiation that could damage other devices in the vicinity. There are also no ground loops with TOSLINK, as is known from other cable connections.
• To guarantee the best sound, we supply our Toslink cable with protective caps on both ends. This protects the optical fiber against dust. Please simply remove these caps before use.

Set your TV/receiver/set top box or other sound device’s internal sound settings to “PCM”, “PCM 2.0” or “Stereo”.

Why? The HDSX TV Sound Optimizer works in uncompressed PCM, the best sound quality. Other digital sound formats, such as Dolby Digital, work in compressed sound quality. This is where these noises come from.

Workaround in the very rare case that your sound device still produces noise despite being set to PCM:

• Connect an “Analog to TOSLINK Adapter” to an analog output on your TV/receiver/set top box, for example called “Audio Out”.
• Connect this adapter to the TOSLINK IN of our device and continue as described under the point “How do I correctly operate the device” on this page.

If your sound transmitting device only has an HDMI connection, connect it to an HDMI audio extractor (not included), which converts the audio signal from the HDMI signal into the optical TOSLINK format. Then connect this extractor to our device and continue as described under the point "How do I set up the device correctly" in this FAQ.

Yes. The HDSX TV Sound Optimizer evaluates the so-called “Spacial Cues”, the spatial information contained in Atmos, and optimizes the sound accordingly if the Atmos sound information is available in PCM 2.0.

The HDSX TV Sound Optimizer works in the PCM audio format. Discrete multi-channel sound formats such as 5.1 are not optimized. However, it is worth listening to the sound we have optimized via a stereo to surround decoder such as Dolby Pro Logic II. Then all the speakers in a multi-channel sound system are active and the sound is optimized simultaneously in real time and spatially.

The company Sonos offers a suitable “TOSLINK to HDMI adapter” to also get the sound into the soundbar via an optical signal connection.

When using speakers instead of headphones on the ANALOG OUT of the HDSX TV Sound Optimizer, the sound field is expanded and gains spatial depth.

The HDSX TV Sound Optimizer is unique. We are not aware of any other model of this type on the market.

If you want to connect headphones to the HDSX TV Sound Optimizer, we recommend a model with its own volume control or a headphone amplifier with its own volume control, as the HDSX TV Sound Optimizer outputs a static signal at its outputs.

• operation manual
• HDSX TV Sound Optimizer HDMI ARC
• USB 2.0 cable, USB-A plug to Micro-USB-B plug (50cm).
• Cable USB 2.0, USB-A plug to Micro-USB-B plug (50cm)
  (This cable is located in the right inner wall of the
  Packaging)
• HDMI 2.1 cable (50 cm), HDSX certified.
• 3.5mm 2.0 mini jack cable (50 cm)
• Self-adhesive Velcro strips for attaching the device behind the TV
  4 rubber feet, self-adhesive for standing

You will find the included USB power cable in the right inner wall of the packaging.

1.) Connect the "HDMI ARC" port on your TV, projector or other sound device to the HDMI ARC IN of the HDSX TV Sound Optimizer. If you are using a projector as a sound source, we recommend setting its volume to around 95%. This gives the HDSX TV Sound Optimizer enough input level to fully optimize the sound. IMPORTANT: If the TV has an eARC/ARC combination port, turn off "eARC" in the TV's internal sound settings. Otherwise, no sound will pass through the HDSX TV Sound Optimizer HDMI ARC.

2.) Connection HDMI ARC IN/HDMI ARC OUT to control TV/projector and sound system with just one remote control: Connect the HDMI ARC OUT of our device to the “HDMI ARC” port of your soundbar, AV receiver, or other sound-receiving device with HDMI ARC port.

3.) Connect our device to a free USB port on your TV/receiver/set top box using the USB power cable provided. The HDSX TV Sound Optimizer will then automatically switch on and off with your device.

4.) Set your TV, set top box or other sound device in its internal sound settings to “PCM”, “PCM 2.0” or “Stereo”.

5.) Mute your TV's internal speakers. For the best sound, we recommend turning off all internal sound effects on the TV/receiver and connected speaker system.

6.) Set the HDSX TV Sound Optimizer to your desired mode using the switches on the front and back.

• For the HDMI ARC IN/HDMI ARC OUT signal connection, the blue “HDMI” LED on the front must light up (“HDMI”/“Analog” selector switch on the front of the device)
• “HDSX.360” is activated when the blue LED with the same name on the front lights up (switch “HDSX.360” on the back of the device)
• The HDSX TV Sound Optimizer is inactive when the “Passthrough” mode is activated, the pink LED “THRU” on the front is lit (switch “THRU” on the back of the device). To activate the HDSX TV Sound Optimizer, switch “THRU” off, the pink LED is not lit.
• When using digital multi-channel sound formats in parallel, "THRU" must be activated. Note: Since the optimizer is then inactive, you have to adjust the volume yourself and you may not understand dialogues

Tip: Turn down your sound system before you activate the HDSX TV Sound Optimizer for the first time using the switches on the back. If you are listening to very quiet content, the volume may automatically increase.

After these installation steps, you will enjoy perfectly balanced TV sound with consistent volume and understandable speech.

Option for parallel use of digital multi-channel sound formats

The HDSX TV Sound Optimizer works in uncompressed PCM sound format, digital multi-channel formats in compressed Bitstream sound format and others.

If you want to use digital multi-channel formats in parallel with the HDSX TV Sound Optimizer without having to change the sound format of your television or other sound device, use the analog input of the optimizer in addition to the installation described above, provided that your television or other sound device has an analog sound output.

A possible analog 3.5 mm mini jack connection cable with a length of 50 cm is included in the scope of delivery of the optimizer.

The additional installation steps:

• Connect the analog output of your TV or other sound device to the HDSX TV Sound Optimizer “Analog In” port on the back.
• We recommend setting the volume of the analog output to around 95%. This gives the HDSX TV Sound Optimizer enough input level to fully optimize the sound. If your sound device has the option to choose between "static" and "dynamic" on the analog output, we recommend "static" for a constant level.
• Leave your TV or other audio device in the digital multi-channel audio format of your choice.
• To enjoy the sound optimized by the optimizer, switch the optimizer to “Analog” using the selector switch on the front (blue “Analog” LED lights up) and switch “THRU” off (“THRU” switch on the back, pink “THRU” LED does not light up).
• To listen to digital multi-channel sound, switch on “THRU” (“THRU” switch on the back, pink “THRU” LED lights up) and switch the optimizer to “HDMI” using its selector switch on the front (blue “HDMI” LED lights up).

PCM stands for “Pulse Code Modulation”. This describes the uncompressed and uncoded digital sound. In other words: PCM offers the best sound quality because the audio data contains all the information from the original transmission/recording.

Setting the digital audio output on the Netflix app to PCM or stereo is the solution here.
1. Open the Netflix app.
2. Select a movie or TV show.
3. Select the Audio and subtitles option.
4. Change the Audio selection from Dolby Digital Plus 5.1 to Stereo.

For the best sound quality, the HDSX TV Sound Optimizer works in the uncompressed PCM audio format. Therefore, please set your TV or the device that plays the sound to this format in its internal sound settings. It is usually called “PCM” or “PCM 2.0” or “Stereo”.

Set your TV/receiver/set top box or other sound device’s internal sound settings to “PCM”, “PCM 2.0” or “Stereo”.

Why? The HDSX TV Sound Optimizer works in uncompressed PCM, the best sound quality. Other digital sound formats, such as Dolby Digital, work in compressed sound quality. This is where these noises come from.

Check whether the HDSX TV Sound Optimizer HDMI ARC is connected to an eARC port on the TV. If so, connect it to a free HDMI ARC port. We also recommend deactivating “eARC” in the TV’s sound settings.

In this case, we recommend using the Toslink version of the HDSX TV Sound Optimizer (link to the Toslink version product page). Here, the optimizer is integrated between the television and the sound system using digital fiber optic connections. It can also be used with headphones.

The HDSX TV Sound Optimizer HDMI ARC only works with components that have their own HDMI ARC connection.

Yes. The HDSX TV Sound Optimizer evaluates the so-called “Spacial Cues”, the spatial information contained in Atmos, and optimizes the sound accordingly if the Atmos sound information is available in PCM 2.0.

The HDSX TV Sound Optimizer works in the PCM 2.0 audio format. This means that in order to use the HDSX TV Sound Optimizer in multi-channel mode, you must activate the stereo to surround decoder such as Dolby Pro Logic II. Then all the speakers in the multi-channel sound system are active and the sound is spatially optimized in real time - you can enjoy even volume and clear speech on all channels.

Discrete multi-channel sound formats such as 5.1 are not optimized by the optimizer. To be able to use digital multi-channel sound formats in parallel, switch the optimizer to “Passthrough” mode using the “THRU” switch on the back of the device (pink “THRU” LED lights up).

Our tip: If you have an analog connection between the TV and the ANALOG IN of the optimizer plugged in parallel to the HDMI ARC connection, you can use the "THRU" button to switch directly between the PCM 2.0 and multi-channel audio formats. You can then use both types of format.

See also the FAQ point “How do I put the device into operation correctly?”

HDSX.360 is a new development from Kronoton that creates both: a large virtual 3D sound stage* and at the same time understandable and clear dialogues.

Up to now, virtual surround and 3D sound systems have mostly had the problem that the louder the sound, the more incomprehensible the dialogues become. They are then even more overlaid by music and noise.

Kronoton has solved this problem by developing HDSX.360: Dialogues are always clearly understandable from the center, music is positioned to the left and right with a large sound stage, while the sounds are distributed freely between the loudspeaker system and the audience, depending on the production in the room.

HDSX.360 translates cinema sound, which was actually produced for large speaker systems in movie theaters, to much smaller speaker systems, such as those used at home. This creates great sound even when heard at room volume. "Virtual" means that invisible speakers are positioned around your speaker system and in the room, radiating the sound with a larger sound stage to the left, right, front, back, bottom and top than the speaker system can achieve on its own.

*The perceived intensity of HDSX.360 depends on the design and positioning of the sound system used.

Yes, that's what they're designed for. Both inputs output the optimized sound lip-synced.

Using the analogue input in parallel with the HDMI ARC input makes sense if you want to use digital multi-channel formats without having to change the internal sound output settings of your television or other sound device from PCM to bitstream or something else. You can find more information on this point under the FAQ point “How do I set up the device correctly?”

The HDSX TV Sound Optimizer is unique. We are not aware of any other model of this type on the market, except for our own Toslink version of the device