[LAU] jack2 set to realtime / soft mode, normal kernel ?

[Harry Van Haaren]

Hi!

Advantages of firewire approach:
1. Bus design. Internally, the firewire chip doesnt have to ask the CPU to
copy data
to its port, it just does it, while USB devices use the CPU for this task.
2. On cheap laptops (and unfortunat others) the IRQ's between USB &
something else
collide. This means worse performance. (I'm aware that Firewire IRQ's can
collide too,
but I've never seen that phenomena before.)
3. Firewire daisy chaining does still exist, at least for the Echo Audiofire
devices that I have.
4. I run a laptop (so PCI / PCI-E and a lot of other options are out. )
5. From my experiences, Firewire devices seem to be more geared towards
professional use,
while USB targets the "pro-sumer" market. (No flame bait intended here..)

I like the Pure::Dyne, its always done well on my laptop. I've Dyne::Bolic
before Pure::Dyne was
released, and I've been keeping a close eye on AV Linux too.. Between them
I've kept my production
system installed (Pure Dyne), and a range of "testing" partitions with
alternatives for Video / Blender work.

Installing Pure::Dyne is no problem, there's an GUI installer on the Desktop
IIRC.
I'd run it live first, just to check it out to be honest. Not sure about
RAID, never needed it.

Your question 2 has me confuzed I'm afraid, you're asking how its updated?
The same
as any other system... a packet manager. Or do you mean how does the LiveCD
get updated?
I think new ISO's are generated every once in a while...  not sure. Check
out RemasterSys if your
hoping to update your Live system and keep it on a CD. (AV Linux is a debian
based RemasterSys distro).

I'm not sure if Pure comes with development tools... It does come with PD,
Processing, Arduino software
etc, but I dont think it has g++, gdb, svn or those installed. That said,
its all a "sudo apt-get install <x>" away.

If you decide to try it, hope it goes well. Your mileage may vary ;-)
Cheers, -Harry


On Sat, Jul 10, 2010 at 8:20 PM, Jonathan E. Brickman
<jeb at joshuacorps.org>wrote:

> Harry, rather good guess :-)  Not Firewire.  AudioTrak Prodigy HD2, PCI.
> It has been extremely well-behaved.
>
> In your opinion, what is the advantage of the Firewire approach?
> Cabling?  Replaceability?  Ease of multitrack functionality?  The
> Firewire daisychain capability (does it still exist)?
>
> I just checked out the Pure::Dyne web site.  Very promising and
> up-to-date, not like I last saw it a while back.  Questions:
>
> 1.  Does it install onto hard drive reasonably easily?  I noticed that
> that page in the wiki isn't there yet, just a title/placeholder.  Can it
> do RAID-1 without terrible pain?
>
> 2.  If it's designed explicitly for DVD/USB use (and it looks like it
> is), is that how it's updated?  In other words, can I expect to just
> update my system device and it will use an existing older-version
> profile reliably?  This would be a very good way to keep a production
> machine.
>
> 3.  Does it include thorough current compilation capabilities?
>
> J.E.B.
>
> On Sat, 2010-07-10 at 18:35 +0100, Harry Van Haaren wrote:
> > Hey Johnathan,
> >
> > Mind expanding a bit on what soundcard your using, kernel version,
> > jack frames & period?
> >
> > If im to guess, you're not on a firewire card, usually the -RT is
> > really nessiary to ensure
> > no XRuns..
> >
> > Maybe you are though.. that's when I'd be really intrested! -Harry
> >
> > PS: I'm not on Fedora at the moment, running Pure::Dyne latest stable.
> > Very good -RT performance
> > on this laptop with that kernel & firewire stack. :-)
> >
> > On Sat, Jul 10, 2010 at 6:28 PM, Jonathan E. Brickman
> > <jeb at joshuacorps.org> wrote:
> >         I was very surprised to see Jack2 working well set to realtime
> >         + soft mode, with a normal (non-rt) kernel, giving me 2.67 ms
> >         stated latency without kernel crashes in Fedora 13.
> >
>
>
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