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FAQ

  • Reference Guide
  • HDSX TV Sound Optimizer S
  • Cable USB 2.0, USB-A plug to Micro-USB-B plug (50 cm).
    • The cable is located in the right-hand inner wall
    • Cable TOSLINK (50 cm). Before using this cable, please remove its protective caps at both ends.
  • Self-adhesive velcro straps for mounting the unit behind your TV set
  • 4 rubber feet, self-adhesive for placing the unit on a horizontal surface

You find the supplied USB power cable in the right-hand inner wall of the packaging.

To guarantee the best sound, we deliver our Toslink cable with protective caps at both ends. We use them to protect the light guide against dust. Simply remove these caps before use.

  • 1.) Before using the Toslink cable, please remove its protective caps on both sides and remove any existing HDMI (ARC) connection between the TV and the soundbar/sound system. It may block the Toslink connection to be established.
  • 2.) Connect the “Digital Audio Out/Optical” of your TV, satellite receiver or other sound-producing device to the TOSLINK IN of the HDSX TV SO. If you are using a receiver as a sound source, we recommend that you set its output volume level to about 95%. This will give the HDSX TV SO enough input level to fully optimise 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 unit 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 unit to the “Analog In” input of your soundbar, AV receiver, headphone amplifier, or other device receiving sound.

  • 3.) Connect our unit to a free USB slot on your TV/receiver/set top box using the USB power cable supplied. The HDSX TV SO will then automatically switch on and off with your device.
  • 4.) Set your TV, Set Top Box or other sound-producing device to “PCM Stereo”, “PCM” or “Stereo” in its internal sound settings. Set the internal speakers of your TV to silent. For 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 its rear panel. If you are listening to very quiet content, the volume may be automatically corrected upwards.

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

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

For best sound quality, the HDSX TV Sound Optimizer S works in uncompressed PCM stereo audio format. Therefore, set your TV or generally the device playing the sound to this format in its internal sound settings. It is usually called “PCM Stereo” or “Stereo” there.

Yes, that’s what they are made for. Both outputs output the optimised sound lip-synchronously. So you can, for example, listen through a soundbar and headphones at the same time. When using headphones, we recommend a model with its own volume control, which we output a static audio signal to at both outputs.

If you have a TV set and a soundbar from the same manufacturer, you can naturally control both devices together with the TV remote control if they are connected via Toslink. The manufacturers have different names for this function, which is also called 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:

Connect the Soundbar additionally via its AUX IN connection (format usually 3.5 mm mini jack) in parallel either to the analogue output of your TV or to the ANALOG OUT of the HDSX TV Sound Optimizer S.

Be sure to stick to the “Digital In” input source and do not operate an HDMI cable in parallel, as this will interfere with the Toslink sound connection. Following this tip, your Soundbar will now switch on automatically together with your TV set. Then set your desired volume once with the remote control of the Soundbar. Since, thanks to our device, it will not change reliably afterwards, you can usually put the remote control of the Soundbar aside. After you have switched off the TV, your Soundbar will also switch off automatically if it no longer receives a signal.

Name of the CEC control function for the various manufacturers:

– LG: Sound Sync or Simplink

– Panasonic: Viera Link

– Samsung: Anynet or Anynet+

– Sony: Bravia Theatre Synch

– Pioneer and Onkyo: CEC

  • TOSLINK has become the accepted digital audio interface for all manufacturers. This makes the HDSX TV Sound Optimizer S compatible with the vast majority of TV sets, sound bars, AV receivers and other speaker and sound-playing systems, as well as headphone amplifiers.
  • It was important for us to develop one device for all, so TOSLINK was the digital audio interface of choice. Compatible and easy plug and play.
  • The method transmits digital audio data by means of light pulses through an optical fibre built into the cable. This sends pulses that are processed in the receiver device as binary codes 0 and 1.
    In addition to the widespread implementation of the standard, TOSLINK has a low susceptibility to interference and no electromagnetic radiation that could damage other devices in the vicinity.
  • TOSLINK also has no humming loops, as known from other cable connections.
  • To guarantee the best sound, we deliver our Toslink cable with protective caps at both ends. We use them to protect the light guide against dust. Simply remove these caps before use.

Set your TV/receiver/set top box or other sound-producing device to “PCM Stereo”, “PCM” or “Stereo” in its internal sound settings.

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

Workaround in the very rare case that your sound-producing device still emits noise despite being set to PCM stereo:

  • Connect an “Analog to TOSLINK Adapter” to an analogue output of the television/receiver/set of the TV set/receiver/set top box, for example called “Audio Out”.
  • Connect this adapter to the TOSLINK IN of our unit and continue as described under the point “How to set up the unit correctly” on this page.

If your sound transmitting device has only a HDMI connection, connect it to an “HDMI Audio Extractor” which converts the audio signal from the HDMI signal into the optical TOSLINK format. Then connect this extractor to our unit and continue as described in the section “How do I to set up the unit correctly” in this FAQ. If your TV set only has an analogue audio output, connect an “Analog to TOSLINK adapter”. Connect this adapter to the TOSLINK IN of our unit, and continue as described in the section “How do I set up the unit correctly” in this FAQ.

Some Metz and Loewe televisions do not encode the audio signal at their digital SPDIF audio outputs to PCM stereo. Our suggestion for a workaround:

Connect an “Analog to TOSLINK Adapter” to an analogue output of the television, named “Audio Out” for example.

Connect this adapter to the TOSLINK IN of our unit and continue as described in the section “How do I set up the unit correctly” in this FAQ.

The HDSX TV Sound Optimizer S evaluates the so-called “spatial cues” contained in Atmos and optimizes the sound accordingly if the Atmos sound information is available in PCM stereo.

The HDSX TV Sound Optimizer S operates in PCM stereo audio format. Discrete
multi-channel audio formats, such as 5.1, are not optimised. However, it is worth to listen to the optimised sound via a stereo to surround decoder, like Dolby Pro Logic II. Then all the loudspeakers of a sound system are active and the sound is optimised simultaneously in real time and also spatially.

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

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

The HDSX TV Sound Optimizer S is unique. We know of no other model of this kind on the market.

The “S” at the end of the name stands for the 360-degree sound technology for headphone use integrated in the ANALOG OUT of the unit, called HDSX.headphone.

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

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