OK so i messed with it a bit, and found that its one of the audio channels thats popping. i think it might have something to do with the ping pong delay im using, but i could be wrong. as the pop has an echo to it. pluginwise, theres just some reverb, some drum compression and ping pong on the one audio channel. ill try removing it and see if i can get it to pop again. resetting the buffer helped too.