Schiit Bifrost Multibit - Sampling Frequency Relay Switch Issue

Discussion in 'Digital: DACs, USB converters, decrapifiers' started by Earfonia, Feb 16, 2016.

  1. Earfonia

    Earfonia New

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    Yesterday I borrowed a Bifrost MB from a friend. When testing it, I heard abnormal glaring treble distortion when playing high resolution flac files (24/88.2 and 24/96), but the DAC sounds excellent on 44.1k files.

    After hours of troubleshooting, I found that sometime a relay switch inside the DAC, that I assume responsible to set the sampling frequency of the DAC to follow the sampling frequency of the music track, sometime fail to switch when the music track sampling frequency changed. I can hear the click when the relay switch.

    I think it is just a minor issue, and a simple power cycle will fix it. But within two days, it already happened twice. So probably something that Schiit might want to check, why sometime the relay fail to switch.

    I managed to capture it to see the distortion on my oscilloscope when the problem happened. Here is the screenshot when it happened on the video clip 1 and 2, and video clip 3 showing when the relay switch works properly.

    Schiit Bifrost Multibit Sampling Frequency Error 01 - Failed


    Schiit Bifrost Multibit Sampling Frequency Error 02 - Failed


    Schiit Bifrost Multibit Sampling Frequency Error 03 - Good



    Btw, it is a very good sounding DAC ;)
     
  2. Hands

    Hands Overzealous Auto Flusher - Measurbator

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    It's a known issue. When it happens, just cycle through the inputs until you get back to the input you need.
     
  3. schiit

    schiit SchiitHead

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    Or contact us. We have a firmware fix.
     
  4. Earfonia

    Earfonia New

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    Cycling the input selection sometime works to fix the issue, sometime doesn't. The issue happened on both USB and Coaxial SPDIF I tried.

    Noted thanks! My friend already emailed Schiit for this.
     
  5. pavement714

    pavement714 New

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    If the firmware update requires sending my Bifrost Multibit in for a few days of repair, leaving me without...that's gonna be rough.
     
  6. MrTie

    MrTie Friend

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    My new Bifrost Multibit had the same issue, but it actually seems to have self healed after about a week or so. Weird.
     
  7. Tuco1965

    Tuco1965 Suffring from early onset Alzheimer's - Friend

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    Mike had stated that most would self heal after a certain amount of time.
     

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