I just open reapitch-bug.RPP in Reaper 3 alpha2b. As you described, it plays only until the env goes to zero and all following beats are silent. But, when I opened the project, it opened in a tab, next to the project I had been working on... After starting playback of your project and having it go silent half way through, when I switch to the other project in the other tab, your project instantly resumes playback, and repeats normally (I listened through to about a dozen repeats.) Then, when I switch back to the repitch-bug.RPP tab, it plays for one or two iterations, and then goes silent half way through. I can't swear to this... but It has sometimes appeard that whether or not it loops with audio when switching back from the other project depends on when in the loop cycle I swtich: If I switch during the down slope, the audio stops when it jumps back, but if I switch in the second half it will play for a repeat or two. Or so it seems. Dunno it that's of any help, but there you go. PS I did not change the algorithm from what it was set to upon opening when I did this. (BTW, being able to have multiple projects in tabs is fantastic!)