Wiadomość #117451

[lord_awesomeguy]

Jak się ma "dynamika" do latencji? Nazwałbym to raczej "komfortem" czy też może "responsywnością". POD wcale nie ma złej latnecji, wynosi ona jak ktoś mierzył na internecie ok. 3ms przy przetwarzaniu sygnału gitarowego przez urządzenie, czyli jest niezauważalna.

Co do działania USB i FireWire:

Although high-speed USB 2.0 (theoretical speed 400 Mbit/s) nominally runs at a higher signaling rate than FireWire 400 (theoretical speed also 400 Mbit/s), data transfers over S400 FireWire interfaces generally outperform similar transfers over USB 2.0 interfaces. Typical USB PC-hosts rarely exceed sustained transfers of 280 Mbit/s, with 240 Mbit/s being more typical. This is due to USB's reliance on the host-processor to manage low-level USB protocol, whereas FireWire delegates the same tasks to the interface hardware (requiring less or no CPU usage). For example, the FireWire host interface supports memory-mapped devices, which allows high-level protocols to run without loading the host CPU with interrupts and buffer-copy operations.

Besides throughput, other differences are that it uses simpler bus networking, provides more power over the chain, more reliable data transfer, and uses fewer CPU resources.

FireWire 800 is substantially faster than Hi-Speed USB, both in theory and in practice.