ASIO for Marantz HD DAC1 can't get exclusive mode (ref#R44DG8)

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1

Hi! What’s not quite right with Roon?

· None of the above quite fits

None of the above quite fits

· None of these quite match

Tell us what's going on

· ASIO for Marantz HD DAC1 cant get exclusive mode

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· Computer home network

2

Hello @danlistenmusic and welcome to the forum.

Sounds wrong to me as ASIO is always exclusive. See also:

Note: Roon will not show you options when no choice is to make for you.

3

When I pick Asio it says fails to initialize the audio device unless I put it to 32 bit 192khz in windows audio device settings which is why I thought it didnt immediately was put into exclusive mode. I dont know enough info about this device if this just upsamples and you dont have to worry about downsampling it when you exit roon and want to watch youtube. But otherwise it would be nice for it to just work when you hit play

4

Did you set that device as default audio device for Windows?

5

When I set a different khz rate at the audio device page it can be 24bit 44.1Khz to 48kh as an example Asio is working as it should but I have to do it every time I restart the computer. When I play Marantz Asio in qobuz(player) it works as normal

I have the device as default

6

Hello @danlistenmusic,

Thanks for reaching out to us.

We took a look at your Roon Server Diagnostics Report and found a few details about the problem.
The Root Cause
The logs show that you have Sample Rate Conversion (DSP) enabled for your Marantz audio zone, which is currently upsampling all your music to DSD128 via DoP (DSD over PCM).
To output DSD128 using the DoP method, the ASIO driver has to instantly switch the DAC’s internal clock to a very high PCM-equivalent frequency (352.8 kHz).
Because you have the Marantz set as your Default Windows Audio Device, Windows grabs control of the DAC at boot and locks its clock at a standard multi-media rate (like 44.1 kHz or 48 kHz). When Roon suddenly demands a massive jump to 352.8 kHz for DoP, the Marantz ASIO driver conflicts with the active Windows mixer, panics, and throws the “Fails to initialize” error.
When you manually change the Windows setting to 32-bit / 192 kHz, you are forcing the Windows audio stack into a high-bandwidth mode, which allows the ASIO driver to make that frequency leap successfully.
How to Fix It
Depending on whether you actually want to keep this DSD upsampling, you have two ways to fix this permanently:

Option A : Disable DSD Upsampling
If you didn’t turn this on intentionally, letting Roon play bit-perfect native PCM will completely fix the issue.

  1. Click on the Volume/Zone icon in the bottom right corner of Roon.
  2. Open the DSP settings.
  3. Find the Sample Rate Conversion section and toggle it to Disabled.
Without DSD upsampling, Roon will stream standard PCM (44.1 kHz, 96 kHz, 192 kHz, etc.). The Marantz ASIO driver handles these native shifts perfectly, and it won't crash after a PC reboot.

Option B: Keep DSD128 but release the DAC from Windows
If you love the sound of DSD upsampling and want to keep it, you need to stop Windows from hijacking the DAC at startup.

  1. Open your Windows Sound Control Panel.
  2. Set any other device (like your motherboard's built-in audio, monitor speakers, or a headphone jack) as your Default Audio Device.
  3. Leave the Marantz unassigned in Windows, dedicating it exclusively to Roon and Qobuz.
This prevents Windows from locking the DAC's clock at boot, allowing Roon's ASIO driver to freely switch to DoP whenever you press play.

Let us know please, if any of the suggested approaches worked for you.

Thanks.