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

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  1. peterjgross
    Thanks for responding. A few points though:
    - As pointed out in previous posts i see the exact same stuttering behavior for all inputs that fall under "App" - so also when playing the same FLAC file from an SD card inserted to the slot in the Pro iDSD. So i consider it highly unlikely that my computer is causing an issue
    - i have tested streaming from different servers running Asset UPnP - a Windows 10 computer and a QNAP NAS (which runs a Linux derivative).
    - i stream from the same source same file to a different DAC (my Marantz SR6012) and there is no stuttering

    So overall the evidence clearly points to an issue with the Pro iDSD.

    A few questions regarding your post:
    - you say you played DSD256. That tells me you played via USB interface (App interface only supports DSD64). My posts refer to App interface, not USB interface
    - when you say "the computer decodes them [media files] to PCM" - that may be true for what Audirvana does when sending files via USB. But i do not believe this is how streaming from a UPnP server works. Most UPnP servers can transcode but this is optional.
     
  2. youurayy
    it's proving to be a neverending story unfortunately
     
  3. gordec
    I have both Jriver and A+ for Windows. As far as A+, I don't think it does any direct DSD bitstream for Pro iDSD. It only allows DSD over PCM and will downsample any DSD files. The network mode of Pro iDSD is limited to DSD64.

    As of Pro iDSD firmware 2.0 RC1 beta, 96k is usually fine. The biggest problem I run into is streaming SACD Isos. Once it starts to sutter, all files will kind of stutter. Restarting Pro iDSD will take care of it, but if you'll just downsample to 96k, then you are usually fine. I have 2 ethernet cards, so I'm running in bridge mode to ensure the fastest connection.

    I have both SMS200 Neo and Ultrarendu coming this week. I want to see 1. if they sound better than the network port of Pro iDSD and 2. do they stutter with higher bitrate files.
     
    Last edited: Feb 25, 2019
  4. bluesaint
    Echoing all the responses here, the issue is with app mode.
     
  5. iFi audio
    We've been constantly working on Pro iDSD's firmware, we were able to address a number of issues, enable MQA, GTO filter and we still haven't said the last word. There's more to come and a bit of patience is all we ask.
     
    iFi audio Stay updated on iFi audio at their sponsor page on Head-Fi.
     
    https://www.facebook.com/iFiAudio/ https://twitter.com/ifiaudio https://www.instagram.com/ifiaudio/ https://ifi-audio.com/ info@ifi-audio.com
    flyte3333 likes this.
  6. iFi audio
    Soon is the right word to describe our progress, yes.

    Nope. We'll ask our R&D, but highly likely we've already shared all we could.

    SNR improvement, 16 different mixing signals available. Burr-Browns' datasheet limitations are bypassed as well.

    Higher SNR is the obvious gain, but it also comes down to what one does with DAC chips themselves and we use them in, yup, interleaved configuration.

    Perhaps our R&D will give us something to share on this subject, but we wouldn't count on it.

    Not really.
     
    iFi audio Stay updated on iFi audio at their sponsor page on Head-Fi.
     
    https://www.facebook.com/iFiAudio/ https://twitter.com/ifiaudio https://www.instagram.com/ifiaudio/ https://ifi-audio.com/ info@ifi-audio.com
  7. Currawong Contributor
    My misunderstanding. It does sound like the unit has an issue if it can't even play back reliably from a micro SD card. I thought I had streamed DSD256 previously, but I tried it again just now and it didn't work.
     
  8. webmi
    :L3000:


    Thats all one could ask for. Thanks a lot. Looking forward to what you can share. I m just a bit technical interessted here.
     
  9. freesole
    Also interested in this. I'm considering the same Dac/Headphone Amps as above and would love to hear if anyone has opinions or thoughts between the Pro iDSD / Brooklyn / ADI-2 Dac.
     
  10. iFi audio
    https://www.researchgate.net/public...idth_of_DACs_by_Analog_Bandwidth_Interleaving

    Details on how we do it in our Pro iDSD are closed to public, but the fundamental principle is well understood. The link above leads to one of the friendlier publications on the subject. Enjoy.
     
    iFi audio Stay updated on iFi audio at their sponsor page on Head-Fi.
     
    https://www.facebook.com/iFiAudio/ https://twitter.com/ifiaudio https://www.instagram.com/ifiaudio/ https://ifi-audio.com/ info@ifi-audio.com
  11. webmi
    All i am saying is i did not a/b the PRO with the ADI, but now i am with the PRO and the ADI is gone.


    THX
     
  12. iFi audio
    You're welcome.
     
    iFi audio Stay updated on iFi audio at their sponsor page on Head-Fi.
     
    https://www.facebook.com/iFiAudio/ https://twitter.com/ifiaudio https://www.instagram.com/ifiaudio/ https://ifi-audio.com/ info@ifi-audio.com
  13. patkwok
    It's really good to know that there will be a further update of firmware to adress the MQA issue. What is the expected release date of it?

    I would like to know one more issue about the Roon readiness of the ifi pro idsd. Is it fully Roon Ready?
     
  14. iFi audio
    Soon.

    Nope.
     
    iFi audio Stay updated on iFi audio at their sponsor page on Head-Fi.
     
    https://www.facebook.com/iFiAudio/ https://twitter.com/ifiaudio https://www.instagram.com/ifiaudio/ https://ifi-audio.com/ info@ifi-audio.com
  15. bluesaint
    is the nope on Roon meaning in the short term, or nope as in not in this lifetime?
     
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