I checked, there's no option in the dropdown but "None". Which plugin you use to fill that? But even if I don't have that, you can see that it's still working in my unit and giving the proper sample rate (you can see in the Lower-Left of Foobar); DSD128 (Blue LED backlight) and DSD256 (Red LED...

It's fine. That instruction manual is old. iFi recently updated USB Driver Software-5.12, because we are unable to update Firmware (iFiUsbAudioDfu is missing in 5.12 Driver before).

Same with me, can't play DSD256 instantly. The workaround I do to jumpstart is to queue 1 DSD128 first, followed by DSD256. Then play that DSD128 and adjust/scroll the seekbar to almost the ending of the song. It will then play the next track (which is DSD256). If you just click "Next" it will...

From his Screenshot, I noticed the Output is only "ASIO". On the link that I provided, it will come as "ASIO+DSD". Sorry for the lack of explanation from my previous post. @cucumber kindly check if this will also work for you.

This is the plugin I'm using (ASIO+DSD), try to install this instead. https://sourceforge.net/projects/sacddecoder/files/foo_out_asio%2Bdsd/

You also need to change SACD>Type, because it's default on PCM.