This might be a useful place to start. One other program that polls the DAC for capabilities is HQPlayer. If you use the NAA remote function, it will tell you a lot about what is being reported back to HQPlayer. Here is that HQPlayer’s NAA is telling it about the Oppo UDP 205:
[networkaudiod] (5688): networkaudiod Copyright © 2011-2020 Jussi Laako / Signalyst. All rights reserved.
[networkaudiod] (5688): ASIO Technology by Steinberg Media Technologies GmbH.
[networkaudiod] (5688): Listen discovery on ::
[networkaudiod] (5688): Listen discovery on 0.0.0.0
[networkaudiod] (5688): discovery from [2601:482:457f:f2aa:b9a6:b6a5:600c:9a01]:54821
[networkaudiod] (5688): connection from [2601:482:457f:f2aa:70d1:b76c:1dc:92ad]:58646
[networkaudiod] (5688): ASIO output drivers: 1
[networkaudiod] (5688): ASIO output found drivers:
[networkaudiod] (5688): ‘OPPO USB AUDIO 2.0 ASIO Driver’ (0)
[networkaudiod] (5688): begin disconnection
[networkaudiod] (5688): disconnected [2601:482:457f:f2aa:70d1:b76c:1dc:92ad]:58646
[networkaudiod] (5688): connection from [2601:482:457f:f2aa:70d1:b76c:1dc:92ad]:58647
[networkaudiod] (5688): Input set channels: 2 (2)
[networkaudiod] (5688): Input supports DSD with any base rate
[networkaudiod] (5688): ASIO output drivers: 1
[networkaudiod] (5688): ASIO output found drivers:
[networkaudiod] (5688): ‘OPPO USB AUDIO 2.0 ASIO Driver’ (0)
[networkaudiod] (5688): ASIO output period time not set, using default
[networkaudiod] (5688): Loaded ASIO driver: OPPO USB AUDIO 2.0 ASIO Driver
[networkaudiod] (5688): ASIO output device supports DSD
[networkaudiod] (5688): ASIO output device supports PCM
[networkaudiod] (5688): ASIO output default format is PCM
[networkaudiod] (5688): ASIO output rates available:
[networkaudiod] (5688): 44100
[networkaudiod] (5688): 48000
[networkaudiod] (5688): 88200
[networkaudiod] (5688): 96000
[networkaudiod] (5688): 176400
[networkaudiod] (5688): 192000
[networkaudiod] (5688): 352800
[networkaudiod] (5688): 384000
[networkaudiod] (5688): 705600
[networkaudiod] (5688): 768000
[networkaudiod] (5688): ASIO output channels: 0 in / 2 out
[networkaudiod] (5688): ASIO output channel map:
[networkaudiod] (5688): 0: Left
[networkaudiod] (5688): ASIO output SampleFormat 18, 32-bit
[networkaudiod] (5688): 1: Right
[networkaudiod] (5688): ASIO outputPCM formats available:
[networkaudiod] (5688): 44100/32/2
[networkaudiod] (5688): 48000/32/2
[networkaudiod] (5688): 88200/32/2
[networkaudiod] (5688): 96000/32/2
[networkaudiod] (5688): 176400/32/2
[networkaudiod] (5688): 192000/32/2
[networkaudiod] (5688): 352800/32/2
[networkaudiod] (5688): 384000/32/2
[networkaudiod] (5688): 705600/32/2
[networkaudiod] (5688): 768000/32/2
[networkaudiod] (5688): ASIO outputDSD formats available:
[networkaudiod] (5688): 2822400/1/2
[networkaudiod] (5688): 5644800/1/2
[networkaudiod] (5688): 11289600/1/2
[networkaudiod] (5688): 22579200/1/2
Now here is the same program polling the Oppo HA-2 portable DAC:
[networkaudiod] (8240): networkaudiod Copyright © 2011-2020 Jussi Laako / Signalyst. All rights reserved.
[networkaudiod] (8240): ASIO Technology by Steinberg Media Technologies GmbH.
[networkaudiod] (8240): Listen discovery on ::
[networkaudiod] (8240): Listen discovery on 0.0.0.0
[networkaudiod] (8240): discovery from 192.168.0.3:55997
[networkaudiod] (8240): discovery from 192.168.0.3:55997
[networkaudiod] (8240): discovery from [fe80::108a:ccbe:ebde:7596%4]:50119
[networkaudiod] (8240): discovery from [2601:482:457f:f2aa:8dd1:4c0f:f74d:be23]:50119
[networkaudiod] (8240): connection from [2601:482:457f:f2aa:8dd1:4c0f:f74d:be23]:53414
[networkaudiod] (8240): ASIO output drivers: 1
[networkaudiod] (8240): ASIO output found drivers:
[networkaudiod] (8240): ‘OPPO USB AUDIO 2.0 ASIO Driver’ (0)
[networkaudiod] (8240): begin disconnection
[networkaudiod] (8240): disconnected [2601:482:457f:f2aa:8dd1:4c0f:f74d:be23]:53414
[networkaudiod] (8240): connection from [2601:482:457f:f2aa:8dd1:4c0f:f74d:be23]:53415
[networkaudiod] (8240): Input set channels: 2 (2)
[networkaudiod] (8240): Input supports DSD with any base rate
[networkaudiod] (8240): ASIO output drivers: 1
[networkaudiod] (8240): ASIO output found drivers:
[networkaudiod] (8240): ‘OPPO USB AUDIO 2.0 ASIO Driver’ (0)
[networkaudiod] (8240): ASIO output period time not set, using default
[networkaudiod] (8240): Loaded ASIO driver: OPPO USB AUDIO 2.0 ASIO Driver
[networkaudiod] (8240): ASIO output device supports DSD
[networkaudiod] (8240): ASIO output device supports PCM
[networkaudiod] (8240): ASIO output default format is PCM
[networkaudiod] (8240): ASIO output rates available:
[networkaudiod] (8240): 44100
[networkaudiod] (8240): 48000
[networkaudiod] (8240): 88200
[networkaudiod] (8240): 96000
[networkaudiod] (8240): 176400
[networkaudiod] (8240): 192000
[networkaudiod] (8240): 352800
[networkaudiod] (8240): 384000
[networkaudiod] (8240): ASIO output channels: 0 in / 2 out
[networkaudiod] (8240): ASIO output channel map:
[networkaudiod] (8240): 0: Left
[networkaudiod] (8240): ASIO output SampleFormat 18, 32-bit
[networkaudiod] (8240): 1: Right
[networkaudiod] (8240): ASIO outputPCM formats available:
[networkaudiod] (8240): 44100/32/2
[networkaudiod] (8240): 48000/32/2
[networkaudiod] (8240): 88200/32/2
[networkaudiod] (8240): 96000/32/2
[networkaudiod] (8240): 176400/32/2
[networkaudiod] (8240): 192000/32/2
[networkaudiod] (8240): 352800/32/2
[networkaudiod] (8240): 384000/32/2
[networkaudiod] (8240): ASIO outputDSD formats available:
[networkaudiod] (8240): 2822400/1/2
[networkaudiod] (8240): 5644800/1/2
[networkaudiod] (8240): 11289600/1/2
In both cases, the output is pretty much the same except in two key places. The PCM rates available for the 205 have 705K and 768K which is part of its chipset that is not supported on the HA-2. And the “outputDSD” rates include 64, 128, 256 and 512.
The HA-2’s “outputDSD” shows only 64, 128 and 256. But since 256 isn’t featured on a DAC without native support since DoP 1. I don’t believe supports 256 (at least not on a machine that maxes at with PCM 384k.
Does this make sense?