The laptop was brand new, bought right after the news about EOS 4.0. https://www.acer.com/ac/ru/RU/content/professional-model/NX.VHSER.00E It’s hard to say if the device performs better on the previous version of Endless OS. I don’t even know where to get this previous version of Endless OS.
But I have already checked - the processor freezes are continue after turning off Wi-Fi.
Therefore, I have 2 versions for: harware or EOS (too heavy).
Apparently the best thing is to try the previous version of Endless OS, could you please give me a link to download it (better if the version is exe).
Rosegarden is available on Flathub, so you should be able to install it from the App Center on Endless OS.
Many audio plugins are also available on Flathub. They can’t be installed through the App Center at present but you can get a list with this GitHub search and install them in the Terminal application with (for example):
jackd cannot be easily installed. If audio apps available in the app center do not work with the built-in PulseAudio sound server, I’m afraid they can’t be used on Endless OS at present. You may be able to run it in a podman container.