I would like to run 2 seperate Reaper process but using different settings (midi ports, audio outs, cpu usage,...). Can this be done automaticcally so I don't have to make these changes each time by hand ?

Not tried it but it is supposedly possible to install a new version into a different folder for testing without damaging the other's settings and allowing you to execute either one so perhaps it's possible to install the same version in the same way.

Well, I need both instances to run at the same time. I tried making a copy of the folder but I wasn't able to run a second instance this way. Only by using "Spawn new instance" does work, but then it always uses the same settings.

Maybe you did this already, but FWIW... Try to: 1. Install Reaper in a dir of its own 2. Move all ini-files into this dir, now Reaper should load the ini's from there 3. Now install a new instance in another dir 4. Move all ini-files into this dir, now this instance of Reaper should load its ini-files from there. I guess you will have problem running both simultaneously since they cannot share ASIO driver. At least for me, when Reaper is running, Mediaplayer cannot access my audio card even when all items are off-line. Maybe there's a setting...

Thanks, didn't think moving the ini files, will try that. Though I'm not sure Reaper will allow a second instance this way. My asio card is multi-client, just have to set 2 differents (virtual) outputs.

Ok, works great, I just have to start the second instance using the /newinst command line. Actually there is even a command line option that let's you select a different config file. But I think I will stick with 2 folders, so I can even give it a different look. To those that, like me, didn't know about the command line options, just run a cmd window in reaper dir and type this: reaper /?

Ok got it thanks ;) Yeap, command line is fun, but only for a very short time.