mike_mccue
Anderton
I'm currently getting 6.5 ms in / 6.5 ms out = 13 ms with the US-366 at 44.1kHz...pretty comparable to other interfaces on this computer. We'll see what the new drivers do.
If you speak with them let them know that 13ms is horrible.
In this day and age a 6ms real life, no make believe, total round trip at 44.1kHz is just about OK and the best appliances are down at or even just below 4ms.
According to
this document from PreSonus, that's not possible unless you monitor outside of the DAW (Line 6's ToneDirect monitoring also uses a clever workaround). My understanding is that, again based on the references in that PreSonus article, although 1.0 ms through the A/D and D/A conversion and the low USB buffering of around 2 to 4 ms that's tuned to their specific system can give round trip latency when monitoring through the Fat Channel of around 5 ms (although they later mention that as you start loading up the Fat Channel, you may need to increase to 9 ms or so) that doesn't take into the account the extra time required by the ASIO buffers.
I''m curious which USB interfaces are able to achieve a round-trip latency of under 4 ms, including everything (A/D conversion, USB layers, and ASIO sample buffers) with a decent track count and a few VIs thrown in for good measure. The Avid, Focusrite, Mackie, and Roland interfaces I've tested all gave comparable results to the TASCAM with projects that require a reasonable amount of processing power although of course, if not a lot was going on the latency could be quite a bit lower. Most of the projects needed at least 128 samples. Hence my comment of "pretty comparable to other interfaces on this computer." The best I've seen is RME, which can hit a little over 5 ms due to the really low safety buffer they use (good drivers). I'm not counting PCI devices like the Lynx.
Also again according to PreSonus that performance isn't "horrible," but more like par for the course, especially if you need to use more than 64 samples to get something to play back no matter what. They say most interfaces have USB buffering of around 6 ms in and 6 ms out. I don't know what's happening on that level, but I'm pretty sure the folks at PreSonus do. However the article isn't dated, so maybe there have been substantial changes since it was written. But I would venture a guess that sub-4 ms performance is the exception, not the norm.
If you speak with them let them know that 13ms is horrible.
Well there would be no real point to that discussion, given that those weren't the drivers they developed in-house. I'll see what the new TASCAM drivers do when I get t a chance to evaluate them. If TASCAM thought that kind of performance was wonderful, they probably would have stuck with what they had.