[x] [2684][x64] VST: Plugin UI doesn't refresh properly (framerate drop)

[Znevna]

Hello, 2682->2683 introduces some issues with the UI of some VST plugins (can be easily spotted in Waves VU Meter Stereo, VUMT Deluxe, Stereo Tool..) it looks like the refresh rate drops for those windows (I don't know what actually happens, but this is the effect).
Went back to 2682, they work fine.
Thank you!

[Artem]

Try on 2684 build

[Znevna]

Can't download that build, redirects to main page.

[Artem]

Please, try now

[Znevna]

It seems better, but still not like 2682. Most noticeable on Stereo Tool (9.92) Input & Output waveform display, that's the most dynamic of them all.

[Artem]

Is VST or DSP version of Stereo Tool you using?

[Znevna]

VST.
We can't run DSP plugins in x64 afaik.

[Artem]

What sound output settings you using?

[Znevna]

WASAPI / 48 kHz / 32bit Float.
I did some tests, it does seem to be output related, I've tried switching to DirectSound / 44.1 kHz and it made things better, I also switched the default format in Windows to 44.1 kHz so that WASAPI can run at 44.1 kHz too and it also made things better (no matter if the file currently played is 48 kHz or 44.1 kHz).
WASAPI Exclusive (Event) is the worst.
Hope this helps.

[Artem]

I think, it depended from device's buffer

[Artem]

Unfortunately, I failed to reproduce an issue with the plugin using 2684 build: https://disk.yandex.ru/i/3vieyMILzJc6wg
What is buffer capacity in your case?

[Znevna]

I have uploaded here 3 short videos and extracted frames from build 2682, 2683 and 2684 https://disk.yandex.ru/d/sYzOjmV8v7JHfg
In the frames folder, frames 8-11 from 2682 are missing in 2683 and even from 2684. It's not that noticeable in 2684 but it's still not as fluid as 2682.
And here is 2684 with WASAPI Exclusive (Event) https://disk.yandex.ru/i/KA-19Nxbq3Mtcg but this is not a regression from 2682, it works pretty much the same in 2682.

[Artem]

Please, try this build: https://disk.yandex.ru/d/XrDgh-yfYQX_TQ

[Znevna]

Maybe it's placebo effect that it looks ok to me, but ...
I did some tests with Voicemeeter which can be used completely virtual without any output selected (internal clock sync) to rule out sketchy windows soundcard drivers.
With it, Wasapi Exclusive Event does not work at all in 2685 (screenshot attached), and errors are present in both Wasapi Exclusive Event and in Wasapi Exclusive Push.
I've tested version 4.70.2254 and it works without issues with Wasapi Exclusive Event. But a lot has changed since that version.
This does seem to be Sound Engine related, I will try to test more versions since 4.70.2254 to see if any version 5 works ok, can I keep posting in this topic what I find?
Thank you!

[Artem]

I've tested version 4.70.2254 and it works without issues with Wasapi Exclusive Event

But v4 does not have VST support at all.

This does seem to be Sound Engine related

We've a lot of changes made in v5.30 (for multiple DSP and VST support) and v5.40 (Cross-platform and silence removing related)