Re: [LAU] small/cheap devices that can run jackd?

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To: Jeremy Jongepier <jeremy@...>
Cc: <linux-audio-user@...>
Date: Tuesday, October 25, 2011 - 10:09 am

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I'm one of the folks performing through a netbook. A dell latitude 2100 --
the rubberized primary-school edition, 2gb ram and one of the atom chipsets.
Maybe now in the $300 range?

I use fluidsynth and bristol with alsa and jackd, setting various patches
across 8 midi channels, playing through an m-audio usb sound processor, with
one or sometimes two usb midi devices as controllers.

I custom-compiled a very lightweight rt kernel. I still use gnome, but turn
off networking to prevent memory usage spikes not related to music... and
keep a close eye on the available system memory and cpu while playing. Also
no holding bristol chords with more than 5 notes. :) I could probably get up
to 7 if I lost gnome, but I prefer the minimalist musical approach to
avoiding xruns. And I like to be able to use the dell's touchscreen to flip
through scanned charts in pdf when I forget what I'm supposed to be playing!

Cheers,
Luke

-----
Luke Peterson
- sent via mobile device -
On Oct 25, 2011 5:11 AM, "Jeremy Jongepier" wrote:

> On 10/25/2011 10:44 AM, Renato wrote:

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I'm one of the folks performing through a netbook. A dell latitude 2=
100 -- the rubberized primary-school edition, 2gb ram and one of the atom c=
hipsets. Maybe now in the $300 range?
I use fluidsynth and bristol with alsa and jackd, setting various patche=
s across 8 midi channels, playing through an m-audio usb sound processor, w=
ith one or sometimes two usb midi devices as controllers.
I custom-compiled a very lightweight rt kernel. I still use gnome, but t=
urn off networking to prevent memory usage spikes not related to music... a=
nd keep a close eye on the available system memory and cpu while playing. A=
lso no holding bristol chords with more than 5 notes. :) I could probably g=
et up to 7 if I lost gnome, but I prefer the minimalist musical approach to=
avoiding xruns. And I like to be able to use the dell's touchscreen to=
flip through scanned charts in pdf when I forget what I'm supposed to =
be playing!

Cheers,
Luke
-----
Luke Peterson
- sent via mobile device -
On Oct 25, 2011 5:11 AM, "Jeremy Jongepier&=
quot; <jeremy@autostatic.com> wrote:
On 10/25/2011 10:44 AM, Renato wrote:

utostatic.com> wrote:
ad all

Hi Renato,

Yes:

if [ $(uname -r | cut -d "-" -f 3) =3D "realtime" ]
then /path/to/startstudio
fi

And the 'startstudio' script looks like this:

#!/bin/sh

modprobe -r ppdev
modprobe -r lp
modprobe -r uvcvideo
modprobe -r videodev
modprobe -r ath9k
modprobe -r r8169
modprobe -r btusb

/etc/init.d/bluetooth stop &
/etc/init.d/cups stop &
/etc/init.d/networking stop &
/etc/init.d/network-manager stop &
/etc/init.d/ondemand stop

killall modem-manager
killall wpa_supplicant

modprobe snd-hrtimer

echo -n performance > /sys/devices/system/cpu/cpu0/cpufreq/scaling_gover=
nor

TASKLETPR=3D76

ps -eLo pid,cmd | grep tasklet | grep -v grep | awk '{ system("chr=
t -f
-p '$TASKLETPR' " $1)}'

echo -n "0000:00:13.0" > /sys/bus/pci/drivers/ohci_hcd/unbind<=
br>

>> And it runs

>> sure your audio device isn't sharing an interrupt with somethi=
ng

USB
the

No, writing the ID of the controller to an unbind file, it's the last
line in the startstudio script.

> cheers,

Best,

Jeremy
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Messages in current thread:
[LAU] small/cheap devices that can run jackd?, Alessandro Preziosi (licnep)..., (Mon Oct 24, 5:23 pm)
Re: [LAU] small/cheap devices that can run jackd?, Jeremy Jongepier, (Tue Oct 25, 7:59 am)
Re: [LAU] small/cheap devices that can run jackd?, Ken Restivo, (Sat Oct 29, 4:36 am)
Re: [LAU] small/cheap devices that can run jackd?, Ken Restivo, (Wed Nov 16, 12:29 am)
Re: [LAU] small/cheap devices that can run jackd?, Egor Sanin, (Fri Nov 18, 4:00 pm)
Re: [LAU] small/cheap devices that can run jackd?, Josh Lawrence, (Tue Oct 25, 9:40 pm)
Re: [LAU] small/cheap devices that can run jackd?, Folderol, (Tue Oct 25, 10:45 pm)
Re: [LAU] small/cheap devices that can run jackd?, mark hadman, (Wed Oct 26, 12:24 am)
Re: [LAU] small/cheap devices that can run jackd?, Jeremy Jongepier, (Tue Oct 25, 8:20 am)
Re: [LAU] small/cheap devices that can run jackd?, Jeremy Jongepier, (Tue Oct 25, 9:11 am)
Re: [LAU] small/cheap devices that can run jackd?, Jeremy Jongepier, (Tue Oct 25, 1:31 pm)
Re: [LAU] small/cheap devices that can run jackd?, Jeremy Jongepier, (Wed Oct 26, 6:12 am)
Re: [LAU] small/cheap devices that can run jackd?, Jeremy Jongepier, (Wed Oct 26, 6:55 pm)
Re: [LAU] small/cheap devices that can run jackd?, Jeremy Jongepier, (Wed Oct 26, 8:18 pm)
Re: [LAU] small/cheap devices that can run jackd?, Luke Peterson, (Tue Oct 25, 10:09 am)
Re: [LAU] small/cheap devices that can run jackd?, Louigi Verona, (Tue Oct 25, 8:52 am)
Re: [LAU] small/cheap devices that can run jackd?, Brett McCoy, (Mon Oct 24, 5:28 pm)