i am using windows 10 pro version 1903. my audio interface is an apollo x8p. i have been mastering with version 9.5, and still am, without any problem.
when i have tried to playback an audio montage through my normal plugin chain in the master section of wavelab 10, unless i have my buffer size set to 512 or lower, i have a huge spike in processor load and a number of my plugin chains that play easily in wavelab 9.5 cripple the processors in wavelab 10.
also, my normal master section plugins that have worked well in wavelab 9.5 are taking 2x or 3x as long to render in wavelab 10 . today a 4 minute song took 8 minutes to render. I’m working with 64 bit 44.1 mixes from cubase 10.
my normal master plugin chain includes a number of universal audio plugins like the manly massive passive and the pultec eq as well as the ampex atr tape plugin. i also use the softube weiss ds1-mk3 and the weiss de esser along with izotope ozone 9. when i tried removing different plugins to see if there was a culprit or several culprits, i found that the universal audio plugins particularly added time to the rendering in wavelab 10, where they do not in wavelab 9.5. in wavelab 9.5, rendering a 4 min song with the master section slots full of the plugins i’ve mentioned would at most take 3 min to 3:15-- but usually less.