So, I’m new to recording and I've been trying to record a few songs/riffs. I'm currently using Reaper as my DAW, Bias FX plug-in, and EZdrummer 2 for drums. The problem I'm having is when I start adding more and more tracks to Reaper the playback gets laggy and almost unlistenable. As a test, I recorded 4 guitar tracks and added drums to it and when I hit playback all I could hear was fuzz. No drums or guitar. Then I turned the fx off of 2 of the tracks and it started to get better. Basically, what I realized is the more tracks I add (especially ezdrummer) the worst the quality gets. I'm not sure what to do next. Rather if its buy some sort of equipment to fix the problem or possibly some sort of software malfunction. If anyone could help that would be great.