DAC doesn't show the correct quality information with Apple Music on MacOS

The DAC does not show the correct stream quality information. This seems to be related to the lack of "exclusive access" of the DAC in Apple Music settings, seems. The DAC shows only quality info corresponding to what is set in MIDI settings, as it simply get an "aggregated" PCM mix, including all the system sounds.

How then correctly propagate the PCM signaling information to the DAC? Will there be an "exclusive access" mode in Apple Music setting, such as for other similar services/players (Tidal, Qobuz, Audirvana)?

Despite the info in the Apple Music player, one can hardly verify what quality is actually propagated to the DAC. I understand, it is working correctly on Apple Music on iOS? but this is not the point, right?

Thanks for feedback

R.



[Re-Titled by Moderator]

Posted on Jun 8, 2021 6:00 AM

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Posted on Jun 8, 2021 10:48 AM

Apple Music app on MacOS does NOT do "EXCLUSIVE MODE"

Meaning, the application itself will not "take over" and stream to your DAC with the native bitrate of the music you're playing via Apple Music.

It will ONLY follow a fixed bit rate which you have set on Audio MIDI Setup for the connected DAC.

For example if you set Audio MIDI Setup for your $15k DAC from Nagra at 96k/24bit, all your music played from Apple Music App on your Macbook will be streamed at 96k/24bit, doesn't matter if the track itself is 44.1k or 96k.

Bottomline, playing music from Apple Music App using a Macbook is not bit-perfect, as it will resampled by whatever fixed setting at Audio MIDI Setup.

Using other player, for example Roon, which has "exclusive" mode will ignore sampling rate setting from Audio MIDI Setup and play tracks matching the material sample rate, up to the max supported bitrate of your DAC.


Playing on iOS, on the other hand, is bit-perfect, aka, no resampling. I've tried connecting my iPhone 11 Pro Max to an external DAC and the DAC displaying matching bitrate of the track.

Which is a shame on Apple how they have missed this on the MacOS Apple Music app.

It is not a OS level issue, they just need to upgrade the Apple Music App to have an "exclusive mode" just like what Roon has MacOS App.


26 replies

Aug 15, 2021 6:19 AM in response to andremu

Possible reasons:

  • HiRes Pass-Thru is only perceivable if you have audio hardware that comes with a purchase price in the four- to five-digit range. That's far beyond what most customers are willing to pay. Apple Music is designed to be an on-the-go service for prosumer listeners who are happy with their AirPods. It is not intended for people who buy an Esoteric DAC to hook their B&W Nautilus speakers on to.
  • Apple does not want to ruin the business of companies like Audirvana, JRiver, qobuz, Tidal and others, who pioneered HiRes Audio over a decade ago already.

Aug 15, 2021 8:24 AM in response to Eprom1

All this is simply not true. An USB dongle for about 100 Eur or even less in combination with good wired headphones gives you HighRes audio cabable stack. It is unacceptable for Apple that the same application (Apple Music) on iOS provides exclusive mode whereas on MacOS not.... Apple does not compete with jRiver air Audirvana, Apple competes with Amazon, Spotify and after the release of the HighRes Audio in the recent updates for Apple Music, they do compete with Qobuz and Tidal as a matter of fact. They both do have MacOS apps providing Exclusive Access, so Apple simply has to do that ASAP.

Sep 4, 2021 4:16 PM in response to Eprom1

Your second bullet point is so inaccurate I can't help but empathize with Android/Windows users' distaste for Apple fans (I'm an Apple fan).


Don't be so naive. Apple is a publicly traded company. This means quarter over quarter growth is obligatory in every single product and service category. Apple has their growth down to a science and they always monetize every single feature beyond what any analyst at JP Morgan or Goldman Sachs could ever expect.


Apple Music Exclusive mode will be no different and will surely launch alongside a product that Apple wants you to buy.

Jun 8, 2021 9:16 PM in response to surfsnow1

Based on research using Apple's about lossless audio page and Darko's video,

  • iPhone lighting max is 24/48, so therefore it only plays Apple "Lossless"
  • AirPlay max is 24/48
  • MacOS is subject to up/down sampling at user's whim via Audio MIDI Setup.
  • iPad with USB-C can play up to 24/192, and therefore Apple "Hi-Res Lossless"
  • AppleTV 4K over HDMI max is 24/48

It seems except MacOS, all other devices play bit-perfect up to their max, and one would assume downsample at higher rates. My thread on same here

Sep 8, 2021 1:29 AM in response to Eprom1

My screenshots of Qobuz and Tidal MacOS apps don't show the full picture - what also happens is that whatever is coming from the stream library is then passed through unresampled to the external DAC (and yes, I'm not talking about MQA here - that's a whole different bag of hurt). The Qobuz screenshot shows a Hires song streaming in, through Qobuz app, to my external DAC, at 192k/24. The external App also shows the same data rate. You are correct, Qobuz is controlling Apple Midi and switching the rate to match the source, but the result is the same - no resampling.


It should be trivial for Apple Music to at least do the same.


I also have Roon (similar in some respects to Audirvana and JRiver), which is my preferred way to play Qobuz and Tidal sources. It provides a setting to take exclusive control of the external USB DAC, which is what I'm hoping Apple will implement for their Apple Music player, without which their lossless music offering remains incomplete.


All I am asking from Apple is for them to make it seamless for me to stream their lossless music in a bit perfect fashion to my DAC equipment. I cannot do that with Apple Music right now, because I have to fiddle with Apple Midi to set the rates equal to stop it from doing a resample.

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DAC doesn't show the correct quality information with Apple Music on MacOS

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