I have updated it actually. I'm on 1.30. Just checked and it appears to be the most recent. Thanks for suggestion and check though! It was a recent new purchase, is it true firmware updates are cumulative? In otherwords, I only need to update the most recent firmware update? I did not do each...

I recently purchased a TEAC HA-P90SD and downloded 5.6 DSD tracks to test and put it to good use. I initially used an older higher quality headphone and then purchased an Oppo PM-3 to apir with it. When first listening to a particular track, mostly acoustic instruments in this particular album...