I have searchbarred this, and haven't found a solution

When i record something in reaper, the first track comes out fine. when i try to record the second track while listening to the first track with headphones to get the correct time, the second track is off by about half a second. i have tried changing my buffers, but anyone who could reccomend some good buffer settings for a three year old windows xp would be appreciated

if the problem is not the buffers, than how do i fix it? i can record just fine in audacity. if you somehow didn't read the title, i am using reaper.
I have the same problem, but I just leave the buffers how they are and then just cut off the part of the second track where the latency is. Not the most efficient way, but it works.
thanks, that didn't work for me, but does anyone else have any solutions.