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From: David O. <da...@ol...> - 2003-11-12 12:34:10
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On Wednesday 12 November 2003 12.09, be...@ga... wrote: [...] > > > > Though we where wondering how RT capable the platform was. If > > > > it's a mini-itx board you are using I guess that it works :) > > > > > > There's no particular reason to suspect problems with the > > > architecture, and I've seen reports of VIA Eden working well > > > with RTAI... > > > > Great. > > No need for RT Linux etc. I have a VIA C3 CPU (although in a > different kind of mainboard, not soldered on the board) and the > latency with a cmedia PCI (with the right lowlatency kernel) is as > low as 3msec. (It's where I currently test LS :-) ). Meanwhile, some mainboards come with f*cked up BIOSos and/or chipset=20 design mistakes that cause latencies of tens or even hundreds of ms=20 *even* with RTLinux or RTAI. (I have one in my prototype rheometer -=20 though I can get around it by disabling BIOS text mode emulation and=20 power management.) My point is just that if a system runs fine with RTAI and/or RTLinux,=20 one can conclude that there are no hardware issues that are likely to=20 cause trouble with any other real time solutions, including Linux +=20 preempt and/or lowlatency. If it *doesn't* run well even with a=20 "real" RTOS, you're screwed, regardless of OS. [...] > > The problem with the mini-box solution is that there is no > > possibility of connecting any other soundcard, it won't fit in > > the box ;) > > See my solution :-) I would really rather have a 1U full width rack mount box - and they=20 have one of those as well: =09http://linitx.com/products/1u_case/ But what about noise levels? Do you actually need those fans,=20 considering that the Mini-boxes have no fans at all, except the CPU=20 fan on 800+ MHz models? Why not replace the CPU fan with a heatpipe +=20 passive radiator solution? (There should be room for one, I think...) Actually, for a sound module, I'd really rather prefer a full width=20 case. More space (most importantly; room for a PCI riser and a proper=20 audio interface), and I don't have any other half width units to pair=20 a Mini-box with anyway. [...] > Yes the case is a bit > more expensive than a traditional case but it's the price you pay > for reduced size, fanless power supply unit, the C3 is a bit slow > but I think it is more than enough for your purpose. I don't mind the prices (those cases are actually quite inexpensive=20 for this kind of stuff) - but I do mind the noise levels of all rack=20 mount cases I've found so far. (Both cases and pre-built systems.)=20 Insane. If you put them in a server room (which is what they're built=20 for), you'll have to sound-proof the server room to avoid annoying=20 people nearby... ;-) //David Olofson - Programmer, Composer, Open Source Advocate =2E- Audiality -----------------------------------------------. | Free/Open Source audio engine for games and multimedia. | | MIDI, modular synthesis, real time effects, scripting,... | `-----------------------------------> http://audiality.org -' --- http://olofson.net --- http://www.reologica.se --- |