28 May
2009
28 May
'09
3:59 p.m.
Tom Dunstan kirjoitti:
Asmo, you seem to be quite happy... any ideas?
Yes I am. Here is my laptop with Echo AudioFire4.
http://www.arkki.info/howto/Ubuntu_Studio/904_ffado_02.png
This time latency is 8 ms. Where, when and why someone needs something
like 3 ms?
I follow this statement here: "Apple considers everything < 10ms as
'good enough'. And the audio pro's seem to be very happy with Apple."
http://subversion.ffado.org/wiki/SomeNotesOnLatency
----
1. Laptop is Intel/ATI based - Acer TM 6592.
studio@ubuntu-studio:~$ lspci
00:19.0 Ethernet controller: Intel Corporation 82566MM Gigabit Network
Connection (rev 03)
00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio
Controller (rev 03)
01:00.0 VGA compatible controller: ATI Technologies Inc Radeon HD 2400 XT
06:00.0 Network controller: Intel Corporation PRO/Wireless 4965 AG or
AGN [Kedron] Network Connection (rev 61)
0a:04.0 FireWire (IEEE 1394): O2 Micro, Inc. Firewire (IEEE 1394) (rev 02)
0a:07.0 FireWire (IEEE 1394): Texas Instruments TSB43AB23
IEEE-1394a-2000 Controller (PHY/Link)
studio@ubuntu-studio:~$
2. I can use wlan with RT kernel (screenshot).
3. I have of course tweaked system, that takes few lines in few files.
studio@ubuntu-studio:~$ cat /etc/security/limits.conf
@audio - memlock unlimited
@audio - nice -19
@audio - rtprio 99
studio@ubuntu-studio:~$
studio@ubuntu-studio:~$ cat /etc/group | grep audio
audio:x:29:pulse,studio
studio@ubuntu-studio:~$
studio@ubuntu-studio:~$ cat /etc/modules
loop
lp
rtc
snd-seq
raw1394
video1394
studio@ubuntu-studio:~$
studio@ubuntu-studio:~$ lsmod | grep 1394
video1394 26216 0
raw1394 35976 28
ohci1394 42548 15 video1394
ieee1394 110176 3 video1394,raw1394,ohci1394
studio@ubuntu-studio:~$
studio@ubuntu-studio:~$ ls -al /dev/raw1394
crwxrwxrwx 1 root root 171, 0 2009-05-28 17:10 /dev/raw1394
studio@ubuntu-studio:~$
----
On the desktop machine I use M-Audio Delta 66, I have both - 8.04 x86_64
and 9.04 x86_64.
Here is my howto in finnish for Ubuntu Studio 8.04 x86_64.
http://wiki.ubuntu-fi.org/Ubuntu_Studio
----
Btw - I used that Ubuntu Studio 9.04 x86_64 (RT kernel) on that laptop
as a Flumotion server over six hours at my daughter's school - just
like year ago.
http://www.arkki.info/howto/Flumotion/Flumotion_02.png
http://wiki.ubuntu-fi.org/Flumotion
----
So to me Ubuntu Studio just works. Maybe I'm just lucky with hardware...
or maybe I have done my homework for hardware...
----
Best Regards Asmo Koskinen.
