Ubuntu Studio (9.10) Mods for FFADO and Ardour

June 6, 2010 Leave a comment

Working on a friends system yesterday, to get Ardour and ffado (for Firewire Audio devices) running properly on Ubuntu Studio I found these helpful:

1. Edit file /etc/security/limits.conf and add two lines to the bottom:

@audio – memlock unlimited

@audio – nice -10

Note: Regarding memory, I noticed a warning running jackd when this is set to unlimited; jackd recommends a value to me which turns out to be 75% of available memory. Probably reasonable to limit Audio programs from any self-defeating attempt to take up all the RAM.

2. Add a udev rule for /dev/raw1394 so a user in the audio group can access it. There was not a ile in /etc/udev/rules.d/ so I created one called 50-raw1394.rules containing this line:

KERNEL==”raw1394″, GROUP=”audio”, MODE=”0664″

Note: just to test things out, can also temporarily give read/write access to /dev/raw1394 by the following command (it is a security risk, and will only work until the next reboot):

$ sudo chmod o+rw /dev/raw1394

Thanks to this page for assistance:  https://help.ubuntu.com/community/Firewire

S.D.G.

Filed under Audio Recording, Linux Tagged with , , , , ,

Windows XP, fakeraid, and dual-boot with Linux – III

April 29, 2010 Leave a comment

The saga completes, for the time being!

My friend upgraded his two 500GB drives in a RAID-1 (fakeraid) for Windows XP  to two 1TB drives using various tools; therefore the 500GB drives were empty and available for Ubuntu Studio.  I installed Ubuntu Studio 9.1 with software RAID-1 on the two 500GB using the link referenced below.

I ran into no issues.  Grub installed itself on the 500GB drives, and did not bother mess with with the fakeraid, which (per previous posts) it could not read anyway.  The system now boots successfully into both Windows XP and Ubuntu Studio; to switch between them, at present, he is using the BIOS boot menu.  Next time I work on it I plan to make it a little simpler by adding a Grub menu to handle this.

But for now, back to the MCSE –> Windows 2008 MCITP Upgrade course material I am studying this week.  Will hopefully work on testing my Edirol FA-66 on the system later next week.

References:

S.D.G.

Filed under Audio Editing, Audio Recording, Computer Hardware, fakeraid Tagged with , , , , , , ,