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  • lisbon
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audio latency
hi i've been lurking around and have a question about latency. of usb, pcie, or hdmi avrs, and onboard audio DACs, which is likely to have the least inherent audio latency on a pc? (putting aside pc specs and differences between individual DACs)
  • Last Edit: 02 December, 2012, 11:43:36 AM by lisbon

  • saratoga
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audio latency
Reply #1
I'd probably get a device that has low enough latency for your needs rather then trying to guess what will have low latency from theoretical arguments about interfaces.

  • lisbon
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audio latency
Reply #2
I'd probably get a device that has low enough latency for your needs rather then trying to guess what will have low latency from theoretical arguments about interfaces.


thanks for responding. that's the practical and sensible thing to do, but i'm interested in theoretical and inherent conditions rather than having a buying dilemma. i'm actually interested to know how each interface acts and what consequences that has (and since people here regularly buy all types of dacs it seems like a good place to ask).
  • Last Edit: 02 December, 2012, 12:40:56 PM by lisbon

audio latency
Reply #3

  • lisbon
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audio latency
Reply #4
DAWBench


oh very cool, thank you. they even have a forum. doesn't say why certain interfaces are better but still very nifty!

audio latency
Reply #5
If I've understood the situation correctly.

PCi-E is theoretically the fastest for data transfer but it's not such a great advantage over the other two main variables. Which are -  the speed of the actual ADC and DAC chips themselves and the quality of the software integration.

So the current champ is the RME UCX. Which is USB but has the latest software and fastest chips.

audio latency
Reply #6
If you want low latency and stability then RME products are amazing. I have had EMU 1820M PCI, MOTU 828mkII USB, Echo Layla 3G and many more.

The worst of them when it came to latency was MOTU. It was USB 2 and for live monitoring you could always hear/feel the delay when you picked strings on the guitar. The second worst was EMU 1820M. Unstable. All I will say. Echo Layla 3G was ok if I remember correctly. Not very low latency but it worked most times.

Now I have a Multiface II with their HDSPe PCIe card and I can use the latest buffer setting of 32 samples (around 0.7ms if I am correct) and it is so remarkebly stable. I can use that settings for projects for big projects and there will be no problems. The problems start occuring if projects start having insane amount of plugins and then I just need to increase the latency to 64-128 samples. So, I really really recommend RME and I do that without getting paid for doing so.

Overall (except RME) I would avoid USB if you are very concerned with latency. Regards.

  • slks
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audio latency
Reply #7
If I understand right, the main thing adding latency to PC audio isn't the hardware, but software. That's why ASIO drivers make such a big impact on latency.

audio latency
Reply #8
hi i've been lurking around and have a question about latency. of usb, pcie, or hdmi avrs, and onboard audio DACs, which is likely to have the least inherent audio latency on a pc? (putting aside pc specs and differences between individual DACs)


Why worry about latency? It does make a difference for live sound and overdubbing. Not much else.

Look at it this way, the recording you listen to was made days, months or years ago. What to worry about a few more milliseconds delay while playing it back?

  • lisbon
  • [*]
audio latency
Reply #9
hi i've been lurking around and have a question about latency. of usb, pcie, or hdmi avrs, and onboard audio DACs, which is likely to have the least inherent audio latency on a pc? (putting aside pc specs and differences between individual DACs)


Why worry about latency? It does make a difference for live sound and overdubbing. Not much else.

Look at it this way, the recording you listen to was made days, months or years ago. What to worry about a few more milliseconds delay while playing it back?


i replied to this sentiment. i asked because i thought someone here might know interface differences since pro audio gear tends to measure latency in sub-milliseconds. probably the wrong forum i guess . basically audio gear got me thinking about things like polling/interrupts/dpc/ioctl... terribly random, i know. apologies, i'll try and find a more appropriate forum heh

btw ronalddumsfeld yeah i figured pcie definitely has the bandwidth upper hand. i think my question might not even be related to the latencies pro audio guys talk about... if the latency is about data transfer speeds then that's not really what i was looking for.

thanks everyone for the replies.
  • Last Edit: 04 December, 2012, 03:35:24 PM by lisbon

  • phofman
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audio latency
Reply #10
You will certainly receive a lot of replies on other forums. I am just afraid most will come from the shady world of opinions, feelings, and voodoo, instead of purely technical facts. Once people eventually pull out their tiny DPC latencies, the discussion will be gone from the actual capture/playback latency. Good luck.

  • lisbon
  • [*]
audio latency
Reply #11
You will certainly receive a lot of replies on other forums. I am just afraid most will come from the shady world of opinions, feelings, and voodoo, instead of purely technical facts. Once people eventually pull out their tiny DPC latencies, the discussion will be gone from the actual capture/playback latency. Good luck.


cheers