Hi nick,
Mark say:
I don't know about the rest of this, but I found mixxx to be *much* more
responsive when I switched to using jack, instead of outputting
directly to alsa.
It is true and improve the Mixxx performance. I thing it hapening because
the latency control passes to jack. But you will need configure correctly
the jack for it works fine.
There is two others things for improve the Mixxx performance:
1) Compile your kernel with Real Time module (
http://rt.wiki.kernel.org/index.php/Main_Page). This module give greater
privileges for multimedia applications and reduce much the latency of your
kernel. Don't use the synaptic to install this kernel. Install the patch and
compile it using this commands:
*Get the sources:*
# wget ftp://ftp.kernel.org/pub/linux/kernel/v2.6/linux-2.6.xx.x.tar.bz2
# wget http://www.kernel.org/pub/linux/kernel/projects/rt/patch-2.6.xx.x-rtx.bz2
*patch the kernel*:
# tar xfj linux-2.6.xx.x.tar.bz2
# cd linux-2.6.xx.x
# bzcat ../patch-2.6.xx.x-rtx.bz2 | patch -p1
*
Config the kernel options:*
# make menuconfig
*
Compile the kernel:*
# make dep
# make bzImage
# make install
*Compile the Modules:*
# make modules
# make modules_install
*Make initrd:*
# mkinitramfs /boot/initrd.img-2.6.xx.x-rt 2.6.xx.x-rt
config /boot/grub :
*
title Ubuntu 8.04.1, kernel 2.6.xx.x-rtx
root (hd0,1)
kernel /boot/vmlinuz-2.6.xx.x-rtx
root=UUID=49ad74ce-2e25-466a-9ba1-1dce957d7721 ro splash
initrd /boot/initrd.img-2.6.xx.x-rtx
quiet*
2) Alter the priority of Mixxx in gnome-system-monitor. When I did this the
Mixxx run so much better on my system. For you do this follow the
instructions:
1) press alt + f2;
2) write gnome-system-monitor;
3) find Mixxx process;
4) click on right button of mouse and choose alter priority;
5) alter for -15 and click on ok;
Now your Mixxx process give more CPU time and I will improve much the
performace. In my Ubuntu Studio 8.04 I did this and Mixxx run without
problems.
If you have any problem contact me.
Sorry about my english, I hope you can understand me.
Thanks,
Leandro Leal
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