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iFi audio Pro iDSD (Official) - NEW Firmware - MQA and more.

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  1. flyte3333
    Just select "none" for forced up-sampling. In this case the "converter" option and quality, doesn't matter if you select "none"

    Screen Shot 2018-09-18 at 11.48.19 am.png

    Up-sample to the max supported sample rate your DAC allows.

    Screen Shot 2018-09-18 at 11.49.29 am.png
     
    Last edited: Sep 17, 2018
    ItsAllInMyHead likes this.
  2. ItsAllInMyHead
    Thank you very much! I assumed a such, but even when "none is selected, it still allows the selection of the Converter etc along with the advanced options. I'd love it if they were "greyed out" when not applicable. The Audirvana+ manual was not super-clear to me. Not complaining at all, but it would seem that the "none" option should be first. <end mini-rant>

    Perfect, thank you! That I did not know, but I had read things similarly posted, but much less clear and concise.

    If you happen to know, is this the "internal" max / native sample rate of the chip or the max sample rate the DAC reports to the software? As an example of my confusion, the Micro BL says it will do up to 768, but w/in Audirvana it only shows 384. With a previous firmware, the Micro BL showed 768. So in that case, should I force it to 384, 768, or some other "internal" native sample rate.

    *Just noticed that Audirvana will only allow upsampling to 384. With that said, is it fair to say that the Micro DSD BL will always apply a filter?

    Once again, thank you!

    [Edited to add section on Max of 384 in Audirvana]
     
    Last edited: Sep 17, 2018
  3. flyte3333
    Don't forget with the micro iDSD BL you have a "bit perfect" digital filter switch. So regardless what max sample rate Audirvana sees, when you switch to bit perfect then no digital filtering is applied inside the micro iDSD BL.

    Screen Shot 2018-09-18 at 1.03.02 pm.png
     
    ItsAllInMyHead likes this.
  4. ItsAllInMyHead
    Brilliant - So "Bit Perfect" basically means "Filters Off" to us noobs.

    Once again, can't thank you enough.
     
  5. flyte3333
    Yup. I always try and point to a real source so that I'm not talking out of my bum (we all do it sometimes). Found this:

    "The Bit-perfect filter originated in CD-77(called Digital Master Mode) then on AMR DP-777 (Bit-Perfect mode) and should ensure unaltered transmission of the data at its original bit-rate and sampling frequency."

    http://support.ifi-audio.com/kb/faq.php?id=27
     
    ItsAllInMyHead likes this.
  6. Currawong Contributor
    The old firmware, which was in my unit when I wrote the post, didn't have the GTO filter. I thought that the "Transient Aligned" filter was the GTO filter. There also wasn't any information on the GTO filter at the time, making it easy for me to confuse things. My video has the same error.
     
  7. avischiller
    Question..
    To connect the Ifi Pro iESL to the ifi Pro iCAN will a regular HDMI work or do I need a special HDMI cable.
     
  8. iFi audio
    A digital filter is a delay chain with each tap adding a 1 sample delay. The taps are summed with varying weights. To avoid audible generation of echo/reverb the delay chain must be comparably short.

    A digital echo machine is a delay chain with each tap adding a 1 sample delay. The taps are summed with varying weights. In order to give usable echo as effect, the delay chain must be very long with delays in 100's of milliseconds.

    The subjective effect of adding echo/reverb at low levels is not perceived as distinct echo but rather as a "more spacious" sound. This is precisely why many gimmicked recordings add artificial echo/reverb, especially those which originate from "dry" studio environment.
     
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  9. iFi audio
    It depends.
     
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  10. avischiller
    It Depends what can you be clear on that
     
  11. iFi audio
    The shortest route would be to ask the Audirvana staff directly. They are great people and we're positive they will help you out!
     
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    ItsAllInMyHead likes this.
  12. iFi audio
    Why yes, yes we can. The HDMI cable for iESL uses the individual, separate grounds for each differential pair as signal lines.

    Sadly while these separate isolated grounds are part of the HDMI standard, most commercially available cables omit these ground lines and thus will not work.
     
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  13. avischiller
    What do I need can you tell me what type of HDMI I need
     
  14. avischiller
    So what is your suggestion I have to do in order to get this connected
     
  15. avischiller
    Were can I get a cable that will work can you help.
    Thank You.
     
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