[FFADO-devel] saffire pro 26 report

[Joern N. <net...@fo...>]

hi guys!


thanks to divine intervention, i now have a shiny saffire pro 26 to play
with :)

with the latest ffado svn, it works nicely, although i'm seeing quite a
few xruns.

a few questions:

why does ffadomixer require a running jackd for most features to work?
for instance, i can't toggle phantom power or inserts without it.
it would be nice to get rid of this quirk, because people might want to
use their hardware kind of standalone without having a jackd up.

what buffer sizes do people use with comparable hardware (without
xruns)? as it is now, i'm running jackd realtime at prio 70, but with a
stock opensuse 10.3 kernel. i can easily cause xruns by wiggling a
window on my desktop even at buffer sizes > 2048 (n=3).

the ieee1394 chip shares an interrupt with a shoddy old tv card, though.
my next step will be to rip it out.

somewhere in the docs, i found a hint to "increase the IRQ priority" -
how do i do that?

what set of low-latency patches are people using?


and a somewhat unrelated question:

since my laptop doesn't have firewire, i'm looking for a pc card. every
single model i've looked at so far relies on an external power supply to
feed bus-powered devices - i'd rather not have yet another cable and psu...
is it possible in principle to build a pc card with bus power that draws
its juice from the pc card slot (i.e. do the power ratings of cardbus
and ieee1394 allow this at all)? has anyone seen such a thing in the wild?

best,

jörn



-- 
jörn nettingsmeier

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