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Thread: Toslink connection not seen by Windows




  1. #1
    genegold is offline Member
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    Default Toslink connection not seen by Windows

    I've now tried to connect three dacs off the motherboard's Toslink port and none have been recognized by Windows (and Realtek). USB is no problem. Toslink cable end shows lighted red, like signal present, and the same Dacs work with Toslink from my TV. Not sure what I'm missing - driver, bios setting...? Any ideas? Thanks,
    Last edited by genegold; 05-18-2013 at 10:59 AM.
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    parsec is offline Senior Member
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    Default Re: Toslink connection not seen by Windows

    The Toslink output connection is always red or lit up, that does not indicate a signal output. So your DAC is not able to lock onto the TOSLINK output?

    Have you selected the TOSLINK output as the default audio device in the Windows Sound option? You may need to adjust the output sampling frequency, is your DAC capable of using rates besides 44.1KHz/16bit? It may be set to 48KHz/24bit or higher in Windows

    Also, if it is controlled by the Windows or other level control, which it usually is, you should set the level to 100%, and adjust the volume elsewhere. Most digital level controls work by removing bits and thus resolution, not a good thing.

  3. #3
    genegold is offline Member
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    Default Re: Toslink connection not seen by Windows

    Thanks, but "not seen by Windows" literally means not recognized by Windows. With a USB connection, Sound shows the Dac by name under "Speakers" and I set it to default, etc., if it isn't already. With Toslink, it's not being seen, so there's nothing to set or adjust. With my TV and the same cable(s), there's no problem locking onto the dacs with Toslink.
    ASRock Z97 Extreme6 / Intel i7-4790K
    32 GB G.Skill DDR3 2133 RAM (Ares 4x8gb)
    EVGA GTX950 SC
    Prolimatech Megahalems Rev. C cooler w/ Nexus Silent Fan
    Seasonic X650 PSU
    Samsung Pro 850 256GB SSD (system drive)
    SanDisk ExtremePro 480, Seagate 1TB, 2TB and 2x 3TB SATA 6Gb/s
    Plextor PX-891SA CD/DVD Writer/Player
    Dell U2412M Monitor (1920x1200)
    IBM Model M keyboard / Bornd M120 wireless mouse
    Thermaltake F31 Case
    Canon MP640 / Brother HL-2270DW printers
    Audio system: Dac + Powered speakers + USB card + LPS + power cond./distrib.
    Windows 10 Pro x64

  4. #4
    parsec's Avatar
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    Default Re: Toslink connection not seen by Windows

    Any SPDIF connection is a one way bit stream, there is no way to send information back from a DAC to the SPDIF source. When using a USB connection, then communication between the source and destination devices is possible. A USB connection to a DAC is not done via a standard SPDIF signal, USB is a packet interface. SPDIF was designed for audio devices and there was no need for two way communication.

    So, there is no way for Windows to see or receive information from a device that is connected to a PC with a SPDIF connection. What does your TV do when your DAC is connected to it with a TOSLINK connection? It locks onto it as it should, and uses the signal, and is selectable as a source.

    I've used the TOSLINK outputs on mother boards, they are listed as a device in the Windows Sound screen Playback tab, Digital Audio (S/PDIF), which can be selected as a source and configured by clicking the Properties button. So you are not seeing an entry like that when you open the Sound option?

    Toslink connection not seen by Windows-spdif-source-png

  5. #5
    genegold is offline Member
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    Default Re: Toslink connection not seen by Windows

    Exactly, not in the Sound screen (and Realtek's). That's all I mean by Windows not "seeing" it, i.e., not registering the device as present. If it did, then I think it would have been straight forward, as it is with USB.
    ASRock Z97 Extreme6 / Intel i7-4790K
    32 GB G.Skill DDR3 2133 RAM (Ares 4x8gb)
    EVGA GTX950 SC
    Prolimatech Megahalems Rev. C cooler w/ Nexus Silent Fan
    Seasonic X650 PSU
    Samsung Pro 850 256GB SSD (system drive)
    SanDisk ExtremePro 480, Seagate 1TB, 2TB and 2x 3TB SATA 6Gb/s
    Plextor PX-891SA CD/DVD Writer/Player
    Dell U2412M Monitor (1920x1200)
    IBM Model M keyboard / Bornd M120 wireless mouse
    Thermaltake F31 Case
    Canon MP640 / Brother HL-2270DW printers
    Audio system: Dac + Powered speakers + USB card + LPS + power cond./distrib.
    Windows 10 Pro x64

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