Applying Pitch Shifter Effect to an audio track makes scrubbing not playback any sound.
Even on sections of the timeline where there are no clips on the Pitch Shifter track, scrubbing plays back no sound. I see the audio meters showing sound, but no playback. Even when I have the effect disabled, still no playback when scrubbing. I have to completely remove the effect to hear playback while scrubbing.
Bug logged as DVAAU-4202632.
Debby Sherr commented
Hello...as per my knowledge even if the new PPro version works better with the variable rates, the plugins may still have difficulty. You may want to convert to something a little friendlier. Give Handbrake a try or you can try transcoding with AME and see if you get something in sync, then apply effects.
AdminMatt Stegner (Admin, Adobe DVA) commented
Thanks for the bug report, I've written it up as reference number DVAAU-4202632.
This has to do with audio effect that have a very high internal latency, such as Pitch Shifter, FFT Filter, Graphics EQ.
One workaround to use until this can be fixed is to use the effect as a Clip based effect, instead of a Track based effect.