montyjnc wrote:From what I understand, the most latency introduced is due to the audio interface/CPU, correct?
Broadly, reliably-achievable (audio glitch free) latency with just a few pipes sounding is mainly determined by the audio interface hardware, its driver, the computer's motherboard, the operating system, and the computer's other hardware and drivers (performance of the system's hardware/drivers in terms of DPC latency, PCIe/USB host controllers, hardware/driver timing jitter, operating system thread scheduler behaviour, etc.).
High polyphonies mainly place demands on the CPU (and to some extent RAM), but achieving high polyphony at low latency is more demanding than doing so at higher latencies because then the system has less capacity to absorb fluctuations/spikes in processing demand from other things (hardware/drivers, other processes running, etc.), i.e. timing/jitter becomes much more critical.
montyjnc wrote:As ram speeds seem to just climb higher and higher (up to 4800mhz now!), do you think we will see any measurable performance increase in Hauptwerk?
The CPU is usually the main bottleneck these days (for high polyphony, and fast organ loading), so RAM speed probably won't make very much difference (assuming your CPU has a large and fast enough CPU cache), but faster RAM certainly doesn't hurt (all else being equal). CPU performance (base CPU clock speed, CPU cache size/performance, number of cores, CPU generation, etc.: viewtopic.php?f=16&t=18044#p138434 ) is likely to be more important.