I’ve been using Phantom II speakers with audirvana usually without incident. However recently Audirvana does not recognize my Phantoms on the network. It is still able to recognize other UPNP devices. I can’t fathom why Audirvana can’t “see” the Phantoms as Roon, AIrplay, and Windows can.
Audirvana Studio 1.13.1 (11301)
Windows 11 (25140) with 16GB physical RAM
Connected account of 
SIGNAL PROCESSING:
Polarity Inversion:
Globally: OFF
Per track: ON
Effects plugins NOT ACTIVE
UPSAMPLING:
r8brain not in use
r8brain filter parameters
Bandwidth = 99.5%
Stop band attenuation 218dB
Phase linear
AUDIO VOLUME:
Max allowed volume: 100
Replay Gain: None
SW volume control: OFF
LIBRARY SETTINGS:
Sync list: 0 folders
Library database path: C:\Users\Shourie\AppData\Local\Audirvana\Audirvana\AudirvanaDatabase.sqlite
Remote Control server:
Listening on 192.168.1.208 on port 56750
ACTIVE STREAMING SERVICES
Qobuz: Connected as Qobuz Studio
TIDAL: Connected as HIFI
=================== AUDIO DEVICE ========================
Max. memory for audio buffers: 11762MB
Local Audio Engine: Kernel Streaming
Preferred device:
Les Fantômes
Model UID:Devialet Les Fantômes
UID:uuid:0cc76d74-7d4d-475d-b80c-70678c42e16d
Active Sample Rate: 44.1kHz
Bridge settings:
Sample rate limitation: 48kHz
Sample rate switching latency: 1.5s
Limit bitdepth to 24bit: OFF
Mute during sample rate change: OFF
Selected device:
Local audio device
Speakers (Realtek High Definition Audio)
Manufacturer: Realtek
Model Name: Unknown manufacturer
Model UID: HDAUDIO\FUNC_01&VEN_10EC&DEV_0295&SUBSYS_10431850&REV_1000
UID: \?\SWD#MMDEVAPI#{0.0.0.00000000}.{19eb252e-87f7-4a42-b54f-aabc83bbf6e9}#{e6327cad-dcec-4949-ae8a-991e976a79d2}
Kernel Streaming capable
1 available sample rates up to 48000Hz
48000
Volume Control
Physical: Yes
Virtual: No
MQA capability
Auto-detect MQA devices: Yes
Not a MQA device, user set to not MQA
DSD capability: Unhandled
Device audio channels
Preferred stereo channels L:0 R:1
Channel bitmap: Ox3, layout:
Channel 0 mapped to 0
Channel 1 mapped to 1
Audio channels in use
Number of channels: 2
Use as stereo device only: No
Simple stereo device: No
1 output streams:
Number of active channels: 2, in 1 stream(s)
Channel #0 :Stream 0 channel 0
Channel #1 :Stream 0 channel 1
2 ch Integer PCM 16bit little endian 48kHz
2 ch Integer PCM 24bit little endian aligned high in 32bit chunk 48kHz
Local devices found : 3
Device #0: Speakers (Realtek High Definition Audio) Manufacturer: Realtek Model UID: HDAUDIO\FUNC_01&VEN_10EC&DEV_0295&SUBSYS_10431850&REV_1000 UID: \?\SWD#MMDEVAPI#{0.0.0.00000000}.{19eb252e-87f7-4a42-b54f-aabc83bbf6e9}#{e6327cad-dcec-4949-ae8a-991e976a79d2} Model Name: Unknown manufacturer
Device #1: BenQ EX3501R (NVIDIA High Definition Audio) Manufacturer: NVIDIA Model UID: HDAUDIO\FUNC_01&VEN_10DE&DEV_0093&SUBSYS_19DA1511&REV_1001 UID: \?\SWD#MMDEVAPI#{0.0.0.00000000}.{08430181-b903-4c05-a7dd-4a1025765b41}#{e6327cad-dcec-4949-ae8a-991e976a79d2} Model Name: Unknown manufacturer
Device #2: Speakers (2- Audioengine D1) Manufacturer: (Generic USB Audio) Model UID: USB\VID_2912&PID_30C8&REV_0003&MI_00 UID: \?\SWD#MMDEVAPI#{0.0.0.00000000}.{c26eabce-2013-4a1c-af15-d83422bc2f66}#{e6327cad-dcec-4949-ae8a-991e976a79d2} Model Name: Audioengine D1
UPnP devices found : 1
Device #0Cone UID: uuid:82a66207-af45-4d3b-863e-c875a3ca9647 Location: http://192.168.1.159:50020/82a66207-af45-4d3b-863e-c875a3ca9647.xml