As you can see, whenever you have a new issue, it is always best to start a new thread. You can always post a link if you believe the issues may be related.
So I am able to reproduce this issue on this 2GB project, and I didn’t notice any other envelope points. It does take a while, but eventually the envelope point gets put in. I’ll take a closer look tomorrow. Later…
On this latter project that you sent me, Audacity is not very responsive for almost anything.
This 4GB project only has about 35 minutes of audio which is an order of magnitude larger that it needs to be. Not only trying to create an envelope point, but doing virtually anything on this project is excruciatingly slow, even selecting a track - which by the way, you can use to rescue this project.
You can rescue this project by taking the following steps:
Click Select on lower track
Wait until Audacity is responsive
Tracks > Mix And Render
Wait until Audacity is responsive
File > Close; Save project? Yes
Wait for close to complete
Notice project now only occupies 800MB
Reopen project
Click Select on upper track
Wait until Audacity is responsive
Tracks > Mix and Render
Wait until Audacity is responsive
File > Close; Save project? Yes
14)Wait for close to complete
Notice project now occupies 400MB
Exit
Don’t be in a rush to do this. Be sure to give Audacity all of time it needs to complete each step. Expect it to take a while. You might want to read a good book while you are waiting.
You will find that with the 400MB project, Audacity will be back to its former responsive self.
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I had to dig through my old tools to be sure what was happening here. Your project actually has the “Envelope Control Point Bug”, which we saw last year and we thought had been fixed in 3.0.5.
Until this issue can be fixed, let me suggest doing a Mix and Render on each track. And if you have a project that you are copying in audio from, do a Mix and Render on the track on that old project before the copy.