Re: [LAD] Usb Audio Driver

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To: Ralf Mardorf <ralf.mardorf@...>
Cc: <linux-audio-dev@...>
Date: Wednesday, December 11, 2013 - 7:01 pm

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Thanks for your response Ralf, our Arch is pretty much dedicated to audio
already, we maintained only the necessary to work as a LV2 host (this
script wouldn't do much actually) and the IRQ's are not shared, we are
using different USB hubs to prioritize audio, I think we did what we could
without changing code lines already, this is why I was asking about the
drivers haha.

2013/12/11 Ralf Mardorf

> On Wed, 2013-12-11 at 14:31 -0200, Lucas Takejame wrote:

_latency
##\n"

--=20
Lucas Conejero Takejame
Engenharia El=E9trica - =EAnfase em computa=E7=E3o
Escola Polit=E9cnica - USP

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Thanks for your response Ralf, our Arch is pretty much ded=
icated to audio already, we maintained only the necessary to work as a LV2 =
host (this script wouldn't do much actually) and the IRQ's are not =
shared, we are using different USB hubs to prioritize audio, I think we did=
what we could without changing code lines already, this is why I was askin=
g about the drivers haha.=A0

2013/12/11 Ra=
lf Mardorf <ralf.mardorf@alice-dsl.net>

On Wed, 2013-12-11 at 14:31 -0200, Lucas Takejame wrote:<=
br>

> we could do on OS changes to achieve a better latency. My doubt is if<=
br>

> sound card, aiming an improve in latency, since our pedalboard

://portalmod.com/en/index.html) has this sound card fixed and we
end an

Linux audio user might be a better place to ask first. Since you'=
re
using Arch, ArchAudio mailing list might be a good place too.

Get rid of as much as you can and avoid shared IRQs. If I only need my
RME card, sometimes I even disable the Envy24 MIDI interfaces.

Often I don't use this script, because it doesn't really improve is=
sues
that much on my machine, but you never know and could try as much tuning
as possible.

Perhaps the links are still helpful, I don't know.

[rocketmouse@archlinux ~]$ cat /usr/local/sbin/tuning
#!/bin/bash

# /usr/local/sbin/tuning - Arch Linux
# 2013/Apr/05

### ht=
tp://www.mythtv.org/wiki/PCI_Latency

### http://wiki.linuxmusicians.com/dok=
u.php?id=3Dsystem_configuration#pci_bus_latency

### Bluetooth
#service bluetooth stop

### Network
#service network-manager stop
#service networking stop # does cause serious issues
#modprobe -r r8169 # Ethernet NIC driver

### TerraTec EWX 24/96
#modprobe -r snd_ice1712

### Others
modprobe -r firewire-ohci
modprobe -r firewire_core
#service cups stop
modprobe -r ppdev # parallel port
modprobe -r lp =A0 =A0# printer

### Unbinding devices
echo -n "0000:00:13.2" > /sys/bus/pci/drivers/ohci_hcd/unbind<=
br>
echo -n "0000:00:13.4" > /sys/bus/pci/drivers/ohci_hcd/unbind<=
br>

### Log file
l=3D"/var/log/tuning.log"
#echo "$ lspci -v =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 " =
=A0> $l
#lspci -v =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 &=
gt;> $l
#echo =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =
=A0 >> $l
echo "# service rtirq status =A0 =A0 =A0 =A0 =A0 " =A0> $l
service rtirq status =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 >> $l
echo "# grep 18: /proc/interrupts" =A0 =A0 =A0 >> $l
grep 18: /proc/interrupts =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0>> $l
echo =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =
=A0 >> $l
echo -n $(date)" - "$(uname -r)" - " =A0 =A0 >> $=
l
cat /etc/issue =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 >>=
$l
echo -e "\n###########################################################=
#############\n" ; cat $l

exit 0

_______________________________________________
Linux-audio-dev mailing list
Linux-audio-dev@lis=
ts.linuxaudio.org

http://lists.linuxaudio.org/listinfo/linux-audio-dev
-- =
Lucas Conejero TakejameEngenharia El=E9trica - =EAnfase em computa=E7=
=E3oEscola Polit=E9cnica - USP

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Messages in current thread:
[LAD] Usb Audio Driver, Lucas Takejame, (Tue Dec 10, 8:44 pm)
Re: [LAD] Usb Audio Driver, Clemens Ladisch, (Wed Dec 11, 7:56 am)
Re: [LAD] Usb Audio Driver, Lucas Takejame, (Wed Dec 11, 4:32 pm)
Re: [LAD] Usb Audio Driver, Ralf Mardorf, (Wed Dec 11, 5:01 pm)
Re: [LAD] Usb Audio Driver, Lucas Takejame, (Wed Dec 11, 7:01 pm)
Re: [LAD] Usb Audio Driver, Kaspar Emanuel, (Sun Dec 22, 2:49 pm)
Re: [LAD] Usb Audio Driver, Ralf Mardorf, (Wed Dec 11, 7:36 pm)
Re: [LAD] Usb Audio Driver, Lucas Takejame, (Thu Dec 12, 5:59 pm)
Re: [LAD] Usb Audio Driver, Gabriel M. Beddingfield, (Wed Dec 11, 1:02 am)
Re: [LAD] Usb Audio Driver, Patrick Shirkey, (Tue Dec 10, 10:49 pm)