Hi, I'm currently trying Machfive 2 on Reaper and I get lots of crashes - they happen with versions 2.53, 2.55 and 3 aplha 1. Most of times, they happen when I close the project (for example choosing "new project" in the file menu while I'm still in a project involving Machfive) : Reaper crashes and so does the ASIO driver. Crashes (with the ASIO driver) also occur when I simply manipulate the plug in : the last one I had was when I created a new empty project, then a new track on which I did put a Machfive and tried to open a sound. It was sufficient to have a crash. There are also projects I made with Machfive without problems that I can't reopen : Reaper crashes in the period during which it loads Machfive. Hours of work lost... So to anyone wanting to use Machfive 2 with Reaper, I strongly don't recommend it. Is there such a known incompatibility problem with GVI 4 ?