Re: achieving very low latency
Re: achieving very low latency
- Subject: Re: achieving very low latency
- From: David Reaves <email@hidden>
- Date: Sat, 07 Jul 2012 20:59:06 +0200
And MY reply was to the (what I believe is a misinformed) claim that only with laboratory-grade equipment can sub 30 mS latency be achieved.
Which is why I brought up ASIO, which uses inexpensive consumer-grade hardware, and which while not perfect, can easily achieve latencies that come nowhere close to as long as 30 mS, often in the single-digit range.
Kind Regards,
David Reaves
On Jul 7, 2012, at 5:21 PM, Paul Davis wrote:
> On Fri, Jul 6, 2012 at 7:41 PM, Markus Fritze <email@hidden> wrote:
> With CoreAudio and the Build-In audio hardware @ 44100Hz with 16 samples buffer size we did measure a round-trip latency of about 2ms. Measured, not guessed. The only other hardware we found that is able to get 16 samples under CPU load is the Apogee Symphony, but you won't get better than the internal audio hardware.
>
> I wasn't questioning the ability to perform at this level. I've seen (and used) Linux systems with both RME and ethernet based audio i/o at the 8 samples per interrupt ("buffer size"), and have seen comparable though not quite equally good results on OS X.
>
> the poster i was replying to was citing ASIO performance which implies highly variable hardware (motherboard, video interface, PCI bus chipset, BIOS, and lots more) which often makes the *actual* usability of this sort of latency hard or impossible.
>
> even on OS X, i've had reports from ardour users of systems that for one reason or another cannot get the latency performance that i and most other OS X users have been witness too.
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