I am using the beta with an iFi iDSD Nano BL and everything seems to work very well with the possible exception of MQA. All the PCM and DSD sample rates play perfectly with neither hissing nor clicking and the DAC happily switches the LED colour to indicate the rate.
MQA, however, does not act as expected. I have a number of MQA sample files which should turn the DAC light Magenta if unfolding is being done properly by Audirvana, leaving the iDSD to render. The LED remains stubbornly green indicating a PCM 44.11/48/88.2/96kHz rate BUT Audirvana shows the correct details for the file being played, identifying MQA and the ultimate rate.
Either Audirvana is correctly identifying the file but not processing it or my iDSD is not operating correctly (latest F/W is loaded) or I am misunderstanding what I am seeing.
Open the detailed audio settings by clicking on the small Arrow right of the device name in the device selection popup
Then open the top section (“Device”) if it is not already open.
The MQA setting is in the “Active Audio Device” paragraph
I also have the ifi Nano BL running on Windows 10 update 1803. I have noticed that the WASAPI audio mode will correctly recognize both DSD and MQA playback if you do not install the ifi ASIO drivers. However, if you install the ASIO drivers it causes the issues you have mentioned. I noticed it also limits playback to a maximum of 32/192 instead of the 32/384 it is capable of.
Also for me personally I was limited to a maximum 96kHz for MQA when playing back in ASIO mode even when manually setting the MQA Render option.
I am reporting this as a possible bug but I don’t know enough about WASAPI to be sure.
The following picture shows the WASAPI set up with an iFi Nano iDSD BL in WASAPI mode. The DAC capabilities seem to be somewhat reduced. PCM should go up to 384, DSD to DSD512 and the MQA Renderer is not auto-detected with nowhere to select it manually.
I am an ASIO user and am happy that this now works correctly. This report may just be my misunderstanding of what WASAPI can do.
For the MQA detected capability, I’ve added its display in the settings, when auto detected (for build 1019).
When you have changed the “auto-detect MQA devices” option, you need to unplug then replug your DAC to have it taken into account, or restart Audirvana Plus