Yeah. So I'm working on this band's album since they're Swedish and I'm in Texas, we had the wacky idea that instead of them sending me the raw tracks and me setting up a fresh Reaper project, they would send their Reaper project file and I'd just load it up without having to fuck with setting any tempos (they have quite a few tempo changes in every track). It's great, works fine in every way and saves me a ton of time BUT it seems like with every single mixdown render I do, there's a little "bloop" sound at the very beginning. It sounds like it's being processed because it has reverb but I have tracks with delay+reverb plugins on them but no tracks with just reverb, so I'm having trouble pinning this down to any single track/plugin. Has anyone else had this issue before? Here's the sound in full glory: https://www.dropbox.com/s/06k3aqcw7oszbvy/bloop.mp3?dl=0 I've tried taking plugins offline and the best result was still having the "bloop" but with no reverb. This doesn't happen with my own projects. i tried rendering my own songs out and no bloop. So I'm thinking this could be something they did inside the project that I can't see/tell. It's literally never happened to me before. i haven't started using any new plugins for this project. So no idea.