Quote:
Originally Posted by
StereoPari
β‘οΈ
Btw how much is PT HD's round trip?
I'd like to know that as well.
According to Apogee (who obviously want to sell their own interfaces) they can get lower than a PT rig with their Symphony PCI cards running Logic on a Mac Pro at 32 samples buffersize and 96kHz operation. I think the roundtrip latency of that setup is a little below 2ms (yes, a true audio in-to-out roundtrip).
For anything native not operating at higher samplerates than 44.1 or 48 (which, due to the added CPU drain of higher rates, is still what most people working with native systems are using), the best I've experienced was using an RME Hammerfall (PCI) on a Windows desktop machine back then under Logic 5.5.1 (the same figures should now as well be possible on Macs, back then RMEs Windows drivers were just better). I think rountrip latency boiled down to something around 4ms (maybe 4.5). Motus interfaces are in about the same league. These are figures that are about as good as Apogees.
In any case, if you want the lowest possible latency on a native system, PCI (or PCMCIA, ExpressCard) is the way to go. RME seems to be almost there with their new Fireface UC and USB 3 might bring quite some more interesting developments to the table, but for the time being, PCI based solutions are king. For now, FW and USB solutions still add more (usually undocumented) "safety buffers", which you can't do anything about (they're a fixed number, regardless of your drivers settings).
I'd be highly interested in some Fireface UC measurings.
As far as keeping latency down while CPU usage is raising goes, it has to be said that most hosts suffer from that problem, Cubase (especially on Macs) is known to be notoriously bad. The only real exception seems to be Logic (unfortunately, I should add), but Reaper seems to be on a good way, too.
With Logic, it's really like "set and forget". I keep my buffersize at 64 all throughout whatever projects. And I can push the CPU to the max without noticeable crackles or anything. Raising the buffersize at that point would perhaps give me another compressor or two, but that's about it. In Cubase however, the differences between, say, 64 and 512 samples buffersize are really dramatic. And that's most likely why almost all Cubase users I know are raising their buffersizes once it comes to mixing. Not too great a solution, IMO. I sometimes just like adding the odd track (using audio software monitoring and/or virtual instruments) when I'm already in mixing stage - not a problem at all in Logic, quite a hassle in Cubase (and some others).
And that's exactly one of the topmost reasons why I'm still using Logic. As long as it doesn't crap out for other reasons (yeah, there's plenty...), it ist without any doubt *the* native environment for low latency operation.
- Sascha