13 Aug
2003
13 Aug
'03
7 a.m.
Atte André Jensen wrote:
I just installed kernel 2.6.0-test3 on my laptop. I
looked around in
/proc and saw all kinds of promissing things showing up there.
/var/log/messages even showed my Evolution USB keyboard. Very nice. But
since I'm fairly new to the kernel2.6.0/build-in-ALSA I'm hoping for
some pointers just to get started.
1) I didn't do any configuration of ALSA. Is that needed? If so how do I
do it now that ALSA is compiled in?
The only difference between 2.2/2.4 and 2.6 is that you don't need to
compile/install the alsa-driver package.
You still need some entries in modules.conf and to install the
alsa-lib and alsa-utils packages. These things are exactly the same as
in 2.2/2.4, so you probably already have them. If not, have a look at
the ALSA website.
Your modules.conf entries would look somewhat like this:
options snd cards_limit=2
alias snd-card-0 snd-intel8x0
options snd-intel8x0 index=0
alias snd-card-1 snd-usb-audio
options snd-usb-audio index=1
# maybe third entry if the mainboard has a MIDI/game port
# OSS emulation entries omitted
It may be possible that your hotplug scripts try to load the OSS
driver (usb-midi) for the keyboard. In this case, add usb-midi to the
/etc/hotplug/blacklist file.
2) Where can I expect my devices to show up? For now I
have an onboard
soundcard (i810) and the Evolution keyboard. I would like to route the
incomming midi to csound, but later also to either Muse or Rosegarden4.
Is that a matter of having the softsynth or sequencer read from
/dev/midi00 (or somthing like that)? And do I simply tell the sound
generating software to direct its output to the appropriate device, say
/dev/audio?
These device files are used for OSS emulation only. ALSA devices are
accessed through the ALSA library.
Audio devices have names like "hw:0,0" or "plughw:0,0" (the numbers
are card and device numbers). For a list of devices, run "aplay -l" or
"arecord -l".
MIDI sequencer ports have names like "72:0" (client and port number).
For a list of ports, run "aconnect -io".
3) I noticed somethiing jack showing up.
This is probably the usb-midi driver. These messages tell you about
the presence of MIDI jacks, and aren't related to the Jack Audio
Connection Kit.
Is jack supported? If so, to what extend?
Yes. Just like in other kernel versions.
HTH
Clemens