The two are interdependent. You can't lower your latency while increasing your buffer size. Unless, however, you use audio direct monitoring or create a low latency mix with your interface's software mixer.

Cheers

Mo is right, the larger buffer takes longer to fill and thus causes greater latency. Many people use a very low buffer while tracking, then switch to a higher buffer for mixing.

Jeff

Mo Facta hinted at the best answer: get proper audio interface made for recording. It will have some provision (hardware monitoring) for bypassing the round trip to the CPU to minimize latency.

Sorry. Stupid iPhone predictive text! I meant ASIO direct monitoring. Get ASIO4all too. That will help.

---
I am here: http://tapatalk.com/map.php?0ud2t2