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  • Miska's Avatar
    Today, 06:29 PM
    Miska replied to a thread MQA technical analysis in General Forum
    Maybe the "MQA decode" is the Render part which is like upsampling plus some noise shaping that adds the noise. Exactly the part that the bug in...
    127 replies | 4994 view(s)
  • Miska's Avatar
    Today, 05:20 PM
    Two options to get started with: ESS Technology :: ES9038PRO AK4497EQ | Product | AKM - Asahi Kasei Microdevices
    2 replies | 200 view(s)
  • Miska's Avatar
    Today, 04:59 PM
    Miska replied to a thread HQ Player in Software
    Talk to your DAC manufacturer... :) Are you using ASIO backend or something else? If you are using ASIO, then you can use the ASIO channel mapping...
    7495 replies | 704061 view(s)
  • Miska's Avatar
    Today, 04:49 PM
    Miska replied to a thread MQA technical analysis in General Forum
    What do they do in following quite typical cases? 1) Master has never seen an ADC, like music created with software synthesizers, or just partially...
    127 replies | 4994 view(s)
  • Miska's Avatar
    Today, 04:18 AM
    Miska replied to a thread HQ Player in Software
    I certainly tested that it does... :/ I'm playing a 15 GB DFF file on Windows while writing this (5.0ch DSD256). And same for the 4.1G and 4.6G...
    7495 replies | 704061 view(s)
  • Miska's Avatar
    Today, 03:55 AM
    Miska replied to a thread HQ Player in Software
    Meaning the network is not up yet at the point when these are started. Make sure you have network configured in /etc/network/interfaces file. If...
    7495 replies | 704061 view(s)
  • Miska's Avatar
    Today, 03:40 AM
    Miska replied to a thread MQA technical analysis in General Forum
    Yes, I think so. Now based on the results discussed in this thread. I get the feeling that the "deblur" apodizing upsampling filter is run primarily...
    127 replies | 4994 view(s)
  • Miska's Avatar
    Yesterday, 06:38 PM
    Miska replied to a thread MQA technical analysis in General Forum
    Only after first playing the MQA file. Because it seems to be part of the MQA rendering stage as shown by mansr's plot of the software render...
    127 replies | 4994 view(s)
  • Miska's Avatar
    Yesterday, 06:31 PM
    Miska replied to a thread MQA technical analysis in General Forum
    Pretty much all do the same, but some DAC chips do linear interpolation instead of ZOH (IIRC, Cirrus Logic). Analog Devices, AKM, TI/BB and Wolfson...
    127 replies | 4994 view(s)
  • Miska's Avatar
    Yesterday, 06:17 PM
    Miska replied to a thread MQA technical analysis in General Forum
    I think it shouldn't be doing it... But maybe the decoder always outputs 2x rate, regardless of input. But the hardware decoder knows from the stream...
    127 replies | 4994 view(s)
  • Miska's Avatar
    Yesterday, 06:09 PM
    I'll check it out for the next image update build. Where is such DAC card available? I didn't find the manufacturer on quick find.
    2113 replies | 209152 view(s)
  • Miska's Avatar
    Yesterday, 05:59 PM
    Miska replied to a thread HQ Player in Software
    To be specific it is not a problem in HQPlayer code (it has always worked on Mac and Linux). I made a workaround for the problem quite long ago, Sep...
    7495 replies | 704061 view(s)
  • Miska's Avatar
    Yesterday, 05:52 PM
    Miska replied to a thread HQ Player in Software
    I have... ;) Check the TLM messages from "journalctl -a" for hints on what may be going wrong, on a successful bootup it has just one message...
    7495 replies | 704061 view(s)
  • Miska's Avatar
    Yesterday, 04:41 PM
    Miska replied to a thread MQA technical analysis in General Forum
    Yes, I have some other similar ones too, where analysis clearly shows brickwall filter at 22.05 kHz. It certainly isn't proving that the content is...
    127 replies | 4994 view(s)
  • Miska's Avatar
    Yesterday, 04:32 PM
    Miska replied to a thread MQA technical analysis in General Forum
    OK, it is a firmware bug in the Meridian DAC firmware. Played exactly same non-MQA track twice, bit-perfect. Only difference being that between the...
    127 replies | 4994 view(s)
  • Miska's Avatar
    Yesterday, 03:05 PM
    Problem with ssh is that you'd need some initial way to login and default passwords are root of all evil. Console logins are safer, since they...
    2113 replies | 209152 view(s)
  • Miska's Avatar
    Yesterday, 02:55 PM
    Miska replied to a thread MQA technical analysis in General Forum
    Haha, obviously typical programmers having fun with magic constants. :D
    127 replies | 4994 view(s)
  • Miska's Avatar
    Yesterday, 02:50 PM
    Miska replied to a thread MQA technical analysis in General Forum
    Well, because it is above Nyquist frequency of the track, it is technically impossible. :) Let's say you have two tracks in 96/24 format, tracks A...
    127 replies | 4994 view(s)
  • Miska's Avatar
    01-17-2017, 06:33 PM
    Miska replied to a thread MQA technical analysis in General Forum
    So it largely matches. The average doesn't show noise increase at the bands where there is also music content, minimum spectrum would probably show...
    127 replies | 4994 view(s)
  • Miska's Avatar
    01-17-2017, 05:37 PM
    Miska replied to a thread MQA technical analysis in General Forum
    Here's same track, recorded at 192k sampling rate from line output of the Explorer2. I tried to get as low noise output from the DAC as possible,...
    127 replies | 4994 view(s)
  • Miska's Avatar
    01-17-2017, 03:27 AM
    Don't do that, don't mix foobar stuff with HQPlayer. First make sure you don't have foobar running, then set your DAC as the device! In...
    2 replies | 430 view(s)
  • Miska's Avatar
    01-17-2017, 03:16 AM
    Miska replied to a thread HQ Player in Software
    No... :D The "benefit" of MQA is very questionable, to me it has more adverse effects than helps anything. But you get better results with...
    7495 replies | 704061 view(s)
  • Miska's Avatar
    01-16-2017, 08:35 PM
    Miska replied to a thread HQ Player in Software
    I don't quite get why would you want this... :) I've been happy with MinimServer + BubbleUPnP Android App, no OpenHome. This should work, I...
    7495 replies | 704061 view(s)
  • Miska's Avatar
    01-16-2017, 04:44 PM
    Miska replied to a thread HQ Player in Software
    No there isn't, because the MQA filter begins to roll-off at about 30 kHz cuts out prety much everything by about 44.1k. At least the Meridian DAC I...
    7495 replies | 704061 view(s)
  • Miska's Avatar
    01-16-2017, 02:27 PM
    Miska replied to a thread HQ Player in Software
    If the "final unfolding" is really just upsampling like it seems to be, then that is already function of HQPlayer. I just like to do the filters my...
    7495 replies | 704061 view(s)
  • Miska's Avatar
    01-16-2017, 02:23 PM
    Miska replied to a thread MQA technical analysis in General Forum
    No it doesn't, it plays it just as it would play any other 96k file. I don't think there is supposed to be any difference... I'll make some analog...
    127 replies | 4994 view(s)
  • Miska's Avatar
    01-15-2017, 08:17 PM
    Miska replied to a thread MQA technical analysis in General Forum
    Here's spectrogram of digital capture of the Tidal software decoded 2L-048 test track. I tried to use same spectrogram parameters you used before. ...
    127 replies | 4994 view(s)
  • Miska's Avatar
    01-15-2017, 06:22 PM
    Miska replied to a thread MQA technical analysis in General Forum
    Well, it lights up with Tidal player, but Tidal application detects the DAC and forces the hardware decoding. So the driver is indicating 48k...
    127 replies | 4994 view(s)
  • Miska's Avatar
    01-15-2017, 05:14 PM
    Miska replied to a thread MQA technical analysis in General Forum
    What happens if you just use the default ALSA plugin setup and store the output? No blue light on Meridian DAC with this file.
    127 replies | 4994 view(s)
  • Miska's Avatar
    01-15-2017, 02:54 PM
    Not so much compared to what comes out of a Meridian DAC doing full decoding. I recognize quite a bunch of common signatures.
    336 replies | 17055 view(s)
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About jeremyb

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Audio System
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Harbeth
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Sennheiser, Beyerdynamic
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