If you are currently running beta firmware you'll need to upgrade via USB stick (or CD).
You can't switch between official and beta firmware with a network upgrade.
There will sadly be NO firmware upgrade to solve this problem. This is what Oppo has told me ...twice!
I didn't know that the volume is reduced when downmixing MCH soundtracks. Thanks for the tip! a bummer to select lesser quality tracks to get the volume up to par.
Actually, in my research on SACD spectral content, i found that many recording studios drastically kill off content above 22kHz, a brickwall filter of sorts! Suprised the heck out of me indeed. So the filter characteristics used on these SACD's isn't any better than the 44.1kHz used on RedBook CDs. The only difference from regular CD is that you are using 24-bits instead of 16-bits with both formats drastically attenuating content above 22kHz.
Looking at the spectral content of some instruments, their relative level of the > 20kHz harmonics (produced by Cymbals up to100kHz and Trumpets up to 90kHz) is on the same or greater level than the ones shown in the 105 plots. The 95 is similar in that regards as well to the 105 and i guess any ther SACD player with DSD capability. The great Nelson Pass (of the Pass Labs fame) said to avoid phase distortions, one has to open up the bandwidth of the amplifier or source device. What am i saying is of these >20kHz harmonics are cut off or smeared by the quantization noise, it smears the phase relationships of the original signals which many say produces audible distortions.
Remember, this noise issue is NOT an Oppo problem at all. Its the law-of-the-land when using any SACD shiny disks, All SACD players exhibit these characteristics.