Opening and closing a similar project could disable the playback of the first project

I have opened a project (call it project A), made some changes and saved as project B. So both projects have nearly identical VSTs setup.

I closed Dorico. Then open project B with playback activated. Made some changes, then open project A with playback deactivated, because I want to check with the version before I made changes for reference. Now I see project A loads VSTs although the play button is disabled. Clicking notes in project A make sound.

Then I play project B. The green playhead line in project B does not move. Project A has a moving green playhead line. I can’t tell if it is playing project A or B, because they are so similar.

Then I closed project A. Sometimes Dorico becomes unresponsive while closing project A. Now, hitting the play button in project B does not play. I must restart Dorico in order to play project B again.

Not sure if it relates to the issue VSTAudioEngine memory leak . But this issue is more serious as it affects my workflow.

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In the Dorico Preferences there is an option for exactly this kind of situation which tells what shall happen when a second project gets loaded. I’m on a smartphone currently so can’t look up where exactly this option is to be found.

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Or have a look at this posting

It is irrelevant.

I believe whatever combinations of what configuration and user interaction are made, it should not cause a project’s green playhead line to be frozen upon clicking the “play” button. Note that when project’s playback is deactivated, the “play” button is not clickable.

Not to say I have set project activation to “Ask”,

and then clicked “Do Not Activate” when loading the second project.


I took videos to better illustrate the problem.

Problem 1: I hit “Play” in project B, but project A plays. You can see project A’s playback is supposed to be deactivated in the video.

Problem 2: I closed project A, then hit “Play” in project B. Nothing plays.

I leave other problems for your investigation.