But I want to be able to hear the VST's sound output from my computer real time without latency. What I am doing at the moment is plugging my headphones into the synth, so I can hear what I play directly from the synth, while the audio gets recorded in reaper via the VST plugin. I tried using several VST plugins, all downloaded from VST4FREE plugins for piano, drum machines, etc., but I face the same problem for all of them. The keyboard works perfectly and I am able to record and export tracks but the problem I'm facing is latency in audio output from my computer when I try to monitor real time. As the MIDI keyboard, I am using my synthesizer - the Roland XPS 10. I am using Cocos Reaper as my DAW software and am trying to record piano tracks using VST plugins downloaded from VST4FREE.