Playback stutters

Hello,
I have had this problem with Dorico since first converting and numerous solutions have been recommended and applied. I thought it was solved.
Then, several weeks ago, it started again. During playback in Write mode, the sound will stop for 1-2 seconds and then resume.
I have tried applying all the system patches to my computer, and this did not help.

What is interesting about what’s happening now is that if it happens on a long tied note, the sound will not resume until after the note has passed. This would seem to suggest where in the rendering process the problem lies. I have spent a lot of time looking for USB-related issues, but if that’s where it was, then as soon as the problem ended
Meditacao.dorico (866.1 KB)
, the sound would resume. It would not be related to the duration of the note in the score.

Please open the attached score. The stutter happened right at [C] and I heard the other parts resume later in that bar, but the flutes did not appear until the “g/d” in bar 40.

I opened your file in the new Dorico 6 (maybe that matters) and it played back perfectly fine, no stuttering anywhere.
It’s obviously not a ‘huge’ score, just 8 instruments, and 1 flow of 121 bars. That should by no means be a problem on even a very modest computer. There must be something on your machine that’s needlessly eating CPU time.
I’d suggest to generate a Diagnostic Report (in the Help Menu), and post that here. One of the developers might be able to tell if there’s something on your system that’s interfering with normal operations.
Catchy tune BTW, I liked it.

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Hi,
When I choose Flugelhorn in setup (using Version 6), it sounds like a piano.

I have a very fast computer (i9-11900k @3.50 GHz, 32GB RAM, SSD) (Windows 11 Pro v22H2)
The Task Manager shows very little else running. CPU at 4%, RAM at 13.3/31.6

I know that without being able to reproduce the problem it’s very hard to fix it. I was hoping that the new behavior might help someone find it by inspection.

I have upgraded to version 6. Hopefully it will cure the problem.

I installed Dorico 6 and at first it seemed better. After using it for ~15 minutes, it stuttered during playback in Write mode. I immediately went to the help menu and asked for a diagnostics report.

Dorico Diagnostics.zip (524.8 KB)

Playback stutter.zip (1.8 MB)

I tried switching from my usual Yamaha Steinberg ASIO driver to the Steinberg builtin ASIO driver so I could play it on my speakers. I had my H4NPro running and you can hear the dropout in the attached playback at around 7 seconds in.

Please download and install the utility LatencyMon. What is that saying?
Simply press the start button and then start up Dorico again.

Hello again, Ulf!
I ran LatencyMon. Without Dorico running, it says everything is fine. With Dorico running, it shows unacceptable delays.

Interestingly, with LatencyMon running, the stuttering becomes much worse, to the point that Dorico is not usable for playback.

I will again follow LatencyMon’s instructions for things to check and update.

Dorico has been running fine for months. I don’t know what changed. The only software I install is Dorico updates and Visual Studio updates.
From my update log, I see:
April 8 .NET 8.0.15
March 11 .NET 8.0.14
February 12 .NET 8.0.13

In the Apps section of Settings I see:
April 26 - Dell Support Assist
April 2 - DVD Player
April 16 - Feedback Hub (Microsoft)
April 29 - Google Chrome
April 1 - HP Smart, HP Support Assistant
April 26 - Intel Optane Memory Management
April 25 - Media Player

latencymon-stats.zip (241.0 KB)

Could be anything. A famous thing that can play a big role id Wifi. Yes, Wifi-drivers can tear down the whole Performance.. If you have, try switching network completely off. But also other drivers can have a negative impact.
And now that I look at your screenshots: LatencyMon already mentions the NVIDIA driver as possible culprit. You might as well search here in the Dorioc forum .

I found this:

when searching for wdf01000.sys. It looks pretty complete. Fingers crossed!