Problem with reverb

Trying to record Vox Track with a little reverb in the cans to sing to. The reverb unit lives in a Korg D1600 and I have a send from Vox Tr to the Korg. The idea is to record one Vox Tr with the reverb on and one with the reverb off (for later processing) That is, I need to have a track without the reverb printed but I need a bit of reverb to sing to rather than dry. Problem is I cannot get the Vox Tr to send anything to the korg (SP Diff output via Presonus Firebox) with the Monitor function off or with the Track muted....so....I sing and hear the latentcy. The Presonus has a mixer section for Zero Latency but it does not make any difference as I cannot set up a send from the mixer...it has to come from the Vox Tr. So....basically...my question is...how do you set up an external reverb unit to give you a zero latency reverb whilst recording into Reap. My instrument tracks are already recorded. I am sure I have missed something v obvious. Thanks

Do you have a dry send that you can use? How about a lite reverb plug in just to get by? That way you can remove the plug in once you have recorded. hope this helps Bardo

routing out to external hardware will always get you some extra latency +1 to suggestion for simple reverb plugin. alternatively, get a little cheapo 4-input hardware mixer, route the vocal track output to the reverb (100% wet) and send that to the mixer instead of back into reaper. plug your master output from reaper into the mixer as well.

Adjust sample size 

You can change the latency by adjusting the samples (hope that is the right word, I'm not at the DAW right now) in the Presonus control panel. I use a Firestudio, and get the latency down to about 12 milliseconds, which I do not notice. I use output tracks with compressors on them to feed back into a live house sound board, without noticeable delay. The delay was very noticeable before I experimented and found the smallest number of samples that wouldn't have pops and clicks. Check out the Presonus forums at for much more on this. Bob

Maybe I'm missing something here, but here's what I do in this situation: Create a hardware send on the track and use presonus' mixing software to route just the vocal to the reverb unit. Send the out from the reverb unit to a different track (or to a headphone amp) and your initial track is unmodified, giving you a wet and dry track to play with.