I remember your report on the topic, I tried to reproduce without success. And unfortunately I still have no clue.
In your files, the glitches are very short, about 1 ms, and don’t look like missing samples. Do you obtain the same problem if using the external gear plugin without external gear (no effect)?
do you run a track through external plugin in 8.5.20 and all sounds/renders correctly?
Can it be because of sound card drivers on something else which changed since 8.5? I just cant understand why .10 & .20 updates started to introduce such audio errors?
Any idea how I can test it out to get some more information? Any tweaks on WL?
i have a similar setup, and had hickups from the very beginning (WL8)
Ultimately i got rid of that by finding settings w Audio Buffer, Buffer Number and
completely shutting off spotlight in os x. that made the biggest difference.
as described here:
I had another look, and I don’t see any part of the code that was modified between 8.5.0 and 8.5.10 and that could relate to this. Hence this is a mystery.
maybe I need to try it with different audio interface or upgrade to Yosemite.