naku sir, medyo bobo ako dyan, how do you reduce the latency?
Sir if I may, latency is like a gauge that is used to measure the total amount of time for an instruction to reach it's output from the time the instruction is executed.
There is no real way of lowering a "PC system's" latency as this is defined by the hardware, primarily the cpu (along with it's bridge) and the I/O system chip and the bus used to carry the instruction. However, you can maximize the latency by reducing non-critical, non-priority and unwanted instructions such as TSRs and all those OS based features that would rather be useless if digital audio is the only job the PC is going to do.
For example, you can disable some plug and play features that hogs cpu power and bus efficiency by actively listening to ports for changes in their states like plugging new devices.
So in short, you are bound by what latency your PC has but you can maximize that by selectively giving your digital audio's signal priority like an expressway.
