· I'm having trouble with Roon ARC
· Other
The iOS18 beta has issues where external DACS are locked into a single sample rate
Ethernet Connected to my Server (2022 Mac Mini Running roon server on MacOS), Fiber Optic Networking into my house, Cat 5&6 cables between the fiber and the Mac
Hi @Reuben_Grote,
Thank you for the report. We’ll escalate to our QA team to make sure they’re aware. At your convenience, please also share a screenshot of Signal Path when playing any content source under these conditions. Thanks!
Both Show me playing a 24/192 kHz File going into the Audioquest Dragonfly Cobalt. The first image shows Max PCM Rate Set for upsampling, the second shows the “for compatibility only” setting as well as what happens when Power of 2 is enabled.
Do note that between uses, the sample rate will change between 44.1 kHz & 96 kHz randomly when plugged in, and will not change in use, and rarely change between connection & disconnection
Hi @Reuben_Grote,
Thank you for the follow-up. QA has a ticket in the pipeline to investigate and correct this behavior - we’ll post here when it’s made its way to an Early Access release.
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· I'm having trouble with Roon ARC
· Other
Hi! I’m a tester for IOS beta, and want to report an issue I’m having with arc not detecting the same rates a dac is capable of. It only shows one. Something is off on the detection. Tried many Dacs… so it’s an arc design flaw. Ideally the app should be able to force upsampling manually but even that doesn’t work… for specific case id like to upsample to dsd before sending to a RU7 dac
unifi business
Hi @ken.kass,
ARC lists whatever the operating system reports as the DAC’s capabilities. This depends on the particular handshake between iOS and the DAC, rather than ARC.
So, we’ll need a little more information to take action on this report:
You have two iOS instances in ARC diagnostics. Please specify which iOS device you’re using in the scenario above.
How are you specifically connecting to the affected DACs (Lightning-to-USB-C cable, camera adapter, etc.)
Please share a screenshot of Signal Path in ARC, as well as the Playback (quality) section in the Settings page.
Hi. Tested multiple iOS devices, and multiple Dacs, ru7, mojo2, l&p w2. All seem to randomly show one sample rate. Tried multiple cables usb-c, and even thunderbolt rated. All are brand name quality cables.
Please advise.
Hi @ken.kass,
Thanks for clarifying. You’re encountering a known issue with ARC on iOS 18 (beta) - Devs have a ticket in for this issue. I’ll merge your post into the tracking thread.
Before, when I would go to the settings of the device in Roon ARC, I would see all the compatible formats. Now I only see 48 KHz (I don’t know why) and when I unplug it, sometimes I get 384 kHz. There is no way for me to get lossless, its always upsampled or downsampled.
Disable your headroom adjustment…
It dosen’t help with the DSD problem
Are you using Bluetooth headphones? That would explain the conversion. Nonetheless, DSP such as headroom adjustment, will convert DSD to PCM.
Of course not, I did the test with two dacs (Hiby FC1 and ici Hip Dac) that support DSD. Normally I don’t have any DSP on…
Click on the DSD tab for settings. What does it show?
You’re upsampling to maximum. So you are using DSP
What should I set it to?
Post a screen shot of your options. I don’t have Arc in use currently.
