I’ve read a number of posts and the Roon documentation to better understand how Roon and my Aries “interact” but haven’t been able to find/understand the answer.
I’m running an Aries with Femto clock with Firmware 6.0. It feeds an NAD M51 DAC (which is not DSD-capable but can receive PCM files up to 24 bit 192kHz). I’m running Roon 1.6 (build 401 64-bit) core on an SSD attached to a QNAP NAS. My library is on separate drives on the NAS. I control Roon using my iPad, iPhone, or MBP.
The settings I’m using on Roon for the Aries endpoint:
a. No MQA support
b. Fixed Volume
c. 0ms Resync Delay
d. Max Sample Rate (PCM) Up to 192kHz
e. Max Bits Per Sample (PCM) 32
f. Zone Grouping Delay (ms) 0
g. Clock Master Priority Default
h. Enable MQA Core Decoder No
i. Multichannel Mixing Downmix As Needed
The relevant settings (I think) on the Aries:
a. Enable Volume Control: Disabled
b. Delay Time: Disabled
c. Available Input Methods: only Roon Ready enabled
d. Streamer Mode: Lightning Device
e. MQA Pass-through: Disabled
f. Decoding Method: Auto
g. PCM Auto Detect: Enabled
h. Convert DSD to PCM: Enabled
i. Filter Mode: Precise
j. Parametric Equalizer: Disabled
k. Speaker Placement: Disabled
Both the Aries and Roon have the ability to do DSP effects such as equalization, etc. How do I ensure that both the Aries and Roon are not processing the signal sent by Roon to the Aries and then to the DAC?
Are my Aries settings “correct” to ensure minimal signal processing by the Aries?
I notice when I play DSD files using Roon that it automatically converts from DSF DSD64 to 32bit 176.4kHz. It appears that this signal is then sent to the Aries using RAAT as a DSD file. I base that hypothesis on the fact that if i turn off “Convert DSD to PCM”, I don’t hear any music coming from the NAD. Why wouldn’t Roon automatically convert this to PCM since it know that I have an NAD USB Output from the Aries?
Is there a way to have Roon only send an unprocessed, bit-perfect signal to the Aries and let the Aries handle all conversions (which is what happens if I use Aurelic’s Lightning app)? If so, what settings would I use?
Conversely, is there a way to have Roon do all processing so that all the Aries does is send the Roon-processed signal to the NAD? Based on my experiment with DSD files it appears that both Roon and the Aries are processing the signal under the settings I’m using.
Thx in advance for helping me to better understand how the Aries and Roon are interacting…will help me experiement with settings/filters moving forward.