29 Dec
2008
29 Dec
'08
3:27 p.m.
On Mon, Dec 29, 2008 at 11:24 AM, Stephen Nesbitt
<stephen_nesbitt(a)alumni.cmc.edu> wrote:
All:
In this maillist I have seen a lot of warning that realtime is broken in
Intrepid. Ok that's understandable if not wonderful :-)
But the question is then if one is running Intrepid what is the proper setup?
I'm looking for something like "The (almost) Perfect Sound Recording Setup
for Ubuntu Intrepid Ibex". This is information I haven't seen and given the
number of questions in reference to Intrepid being asked on this list, one
that might be valuable.
The fundamental requirement is that one is running Intrepid as one's main
system. Replacing Intrepid with Hardy is not an option.
Here are some possibilities that have crossed my mind:
1) Setup a dual boot Hardy/Intrepid system - doable but a pain because of 1)
the need to reboot and 2) the potential loss of access to one's standard home
directory, tools, email and system configuration.
2) Use Intrepid despite not having access to a realtime kernel. In this case
information on realistic expectations on latency, how to best configure Jack to
limit xruns, etc would be very nice. In other words, can Intrepid even be used
as a base for music recording and what are the gotchas (if any)?
I'm stuck on non-realtime Intrepid (my motherboard + embedded Intel
graphics card are new enough to require 2.6.27), so I can give you one
data point: with a USB soundcard and -n 3 -p 512, I get at most a few
xruns per hour. Disabling cpu frequency scaling helped a lot, as has
avoiding high cpu usage. It's not good enough for click-free
recording, but it's reasonable for live performance.
(I tried the ubuntu 2.6.27-rt package, but it was broken for me in
many ways. YMMV of course.)
3) Run Hardy based studio as a guest OS in vmware or
VirtualBox. I don't even
know if this is possible? What does it mean to run a guest OS in a realtime
environment when the host is not? And even if that isn't a problem, how does
one configure the sound system? For instance how do I get the guest system to
recognize my Delta 44 card? Or PulseAudio?
Thanks in advance!
-steve
--
Jacob Lee
artdent(a)gmail.com