Re: [LAU] light weight, full featured desktop for audio

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To: len@ovenwerks.net <len@...>
Cc: linux audio users <linux-audio-user@...>
Date: Wednesday, February 20, 2013 - 5:06 pm

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El mi=E9rcoles, 20 de febrero de 2013, Len Ovens escribi=F3:

> With all the talk about minimal DE installs, and reading about the

of
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.
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y
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e

Nice report, Len.

Since time ago I've been thinking about implementing something similar but
with no PC but just portable solutions:
one of the choices was a combination of Raspberry for audio (RaspMusix, I'm
working in), that would be your headless/audio component; and some phone,
tablet or touchscreen where I can monitor parameters, play a virtual
keyboard and rule the other component, whether it'd be connected (wifi or
direct ethernet cable) to its X server or simply running scripts/commands
via ssh, or sending MIDI / OSC...

A convenient add would be any decent audio interface that is supported on
the audio componente, it would help save resources and would improve audio
quality, and maybe it would have a monitor out for headphones or speakers.

My two cents.

--=20
Carlos sanchiavedraz
* Musix GNU+Linux
http://www.musix.es

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El mi=E9rcoles, 20 de febrero de 2013, Len Ovens escribi=F3:With all the talk about minimal DE installs, a=
nd reading about the

problems with different kernels and video cards... and what things cause
xruns. I thought of a solution that may work well.

Here is my minimal DE through the eyes of ps:

joet@music:~$ ps x
=A0 PID TTY =A0 =A0 =A0STAT =A0 TIME COMMAND
=A03784 ? =A0 =A0 =A0 =A0S =A0 =A0 =A00:00 sshd: joet@pts/0
=A03785 pts/0 =A0 =A0Ss =A0 =A0 0:00 -bash
=A03886 pts/0 =A0 =A0S =A0 =A0 =A00:03 xfce4-panel
=A03890 pts/0 =A0 =A0S =A0 =A0 =A00:00 dbus-launch --autolaunch
Nice report. Some time ago I've been thinking something similar but wit=
h no PC but just portable solutions: one of the choices was a combination o=
f Raspberry for audio (RaspMusix, I'm working in), that would be your h=
ead

cc2b7c64cc6292515b70bed80000
=A03891 ? =A0 =A0 =A0 =A0Ss =A0 =A0 0:00 //bin/dbus-daemon --fork --print-p=
id 5
--print-addres
=A03893 ? =A0 =A0 =A0 =A0S =A0 =A0 =A00:00 /usr/lib/xfce4/xfconf/xfconfd
=A03909 pts/0 =A0 =A0R+ =A0 =A0 0:00 ps x
----------------------------------------------------------------

Yup, 6 things. The idea is to use two computers. Some of the mini atom MBs<=
br>
would easily fit two in one case and still use no fans and one PS. They
all have Gb networking, so a small switch between them is all that is
needed. This assumes a single audio card with enough channels for whatever<=
br>
you are doing, either pci, USB or (with a pci(e) FW card) FW.

One computer is headless and never runs X, though it would have most of
the x libs anyway. All of the audio SW would be installed on this machine.<=
br>
I only used xfce4-panel because it was already there (it's running
ubuntustudio in real life sitting at the login screen). The panel has been<=
br>
cleared of all applets except for the main menu and shrunk to fit. I am
not sure if this is enough, some people may need a systray as well. The
panel seems to launch dbus for me too (good). The main thing is that it
gives me a menu for that machine where the apps it launches all inherit
the same dbus info and display. An ncurses based menu could work just as
well. and there are other panels or docks which would also work.

The second computer can run any linux or BSD or anything else so long as
it has an xserver (even windows I think can have an xserver). It does not
matter what video card you use, because you can run a generic kernel that
the driver is made to run on. You don't have to think about interrupts =
or
anything like that. Pulse run on this machine will not affect jack in any
way. Rather than bother with figuring out a pulse-jack bridge, connect
line out from the head board to the line of the audio board and vise versa<=
br>
and use zita-a2j and zita-j2a to add them to jack.

My machines are not the best trial. I am using wireless networking (b
version with max 11M, but most often less) but even with 100M there is
some lag, though it doesn't effect the audio at all. Gb net would proba=
bly
be good enough though.

affects latency? yup. jack running -p16 -r 48000, guitarix on top. very
few Xruns, with the DE on the same machine I had 1000s/minute. No mouse/kb<=
br>
irqs, no video irqs, Makes this old P4/2.4G sing. I'll have to try dual=

heading the gui box (aspire one netbook).

So far I think this is a better solution than running the audio across the<=
br>
net.

--
Len Ovens
www.OvenWerks.net

_______________________________________________
Linux-audio-user mailing list
Linux-audio-user@lists.linuxaudio.org<=
/a>
http://lists.linuxaudio.org/listinfo/linux-audio-userNice report=
, Len.
Since time ago I've been thinking about implementin=
g something similar but with no PC but just portable solutions:=A0one of the choices was a combination of Raspberry for audio (RaspMusix, I=
'm working in), that would be your headless/audio component; and some p=
hone, tablet or touchscreen where I can monitor parameters, play a virtual =
keyboard and rule the other component,=A0whether=A0it'd be connected (w=
ifi or direct ethernet cable) to its X server or simply running scripts/com=
mands via ssh, or sending MIDI / OSC...
A convenient add would be any decent audio interface th=
at is supported on the audio componente, it would help save resources and w=
ould improve audio quality, and maybe it would have a monitor out for headp=
hones or speakers.
My two cents.-- Carlos sanchiavedraz* Musix GNU+Linux=A0 http://www.musix.es

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Messages in current thread:
[LAU] light weight, full featured desktop for audio, Len Ovens, (Wed Feb 20, 7:37 am)
Re: [LAU] light weight, full featured desktop for audio, Carlos sanchiavedraz, (Wed Feb 20, 5:06 pm)
Re: [LAU] light weight, full featured desktop for audio, Raffaele Morelli, (Wed Feb 20, 7:45 am)
Re: [LAU] light weight, full featured desktop for audio, Carlos sanchiavedraz, (Wed Feb 20, 5:06 pm)
Re: [LAU] light weight, full featured desktop for audio, William Light, (Wed Feb 20, 12:59 pm)
Re: [LAU] light weight, full featured desktop for audio, Raffaele Morelli, (Wed Feb 20, 1:56 pm)
Re: [LAU] light weight, full featured desktop for audio, William Light, (Thu Feb 21, 11:47 pm)
Re: [LAU] light weight, full featured desktop for audio, Ralf Mardorf, (Fri Feb 22, 8:48 am)
Re: [LAU] light weight, full featured desktop for audio, Dave Phillips, (Fri Feb 22, 12:50 pm)
Re: [LAU] light weight, full featured desktop for audio, Ralf Mardorf, (Fri Feb 22, 1:07 pm)
Re: [LAU] light weight, full featured desktop for audio, Ralf Mardorf, (Sat Feb 23, 12:07 pm)
Re: [LAU] light weight, full featured desktop for audio, Ralf Mardorf, (Fri Feb 22, 1:23 pm)
Re: [LAU] light weight, full featured desktop for audio, Joe Hartley, (Fri Feb 22, 12:37 am)
Re: [LAU] light weight, full featured desktop for audio, Ralf Mardorf, (Wed Feb 20, 1:36 pm)
Re: [LAU] light weight, full featured desktop for audio, M. Edward (Ed) Borasky, (Fri Feb 22, 1:06 am)
Re: [LAU] light weight, full featured desktop for audio, Raffaele Morelli, (Wed Feb 20, 2:13 pm)
Re: [LAU] light weight, full featured desktop for audio, Ralf Mardorf, (Wed Feb 20, 2:32 pm)
Re: [LAU] light weight, full featured desktop for audio, Raffaele Morelli, (Wed Feb 20, 2:36 pm)
Re: [LAU] light weight, full featured desktop for audio, Ralf Mardorf, (Wed Feb 20, 3:09 pm)