27 Sep
2009
27 Sep
'09
3:43 p.m.
All,
Since we'll be buying a laptop for our oldest son's birthday I
though heck, perhaps I can piggyback on it when he's not using it
and maybe have an easy-to-use, light, way of recording sketches
and improvs on some weekends mornings in the living room. And
hopefully being able to take some of that to the main
workstation's Ardour setup for further development. Sketches
would be done using an accoustic guitar and a small MIDI
keyboard (using fluidsythn, zyn and perhaps linux sampler).
So here I have a few questions.
1) What is the most easiest-to-setup MIDI/audio interface for a
laptop ? Fedora 11 will be installed on the laptop. The laptop
will probably be a dual core with 2 to 4 GB of RAM and some 300
GB hard disk. The screen will probably 16". This will not be a
top-of-the-line laptop.
2) What are the options to record accoustic guitar ? Are a
traditional boom and mic the only way w/o having a built-in
pickup installed in the guitar ?
3) What would be the very smallest MIDI keyboard available ? I
have an Axiom 25 although something even smaller would be nice.
4) What are the options to hearing stuff ? So far I think that
the laptop's speakers, processed by Jamin could be OK. Are there
any small/tiny external speakers for this kind of application ?
5) On the software side, there should be no problems in running
any audio app on modern laptops ? Or are there distro/laptop
incompatibilities issues that would prevent jack from running for
instance ?
Finally, if there are any web sites dedicated to Linux laptop
audio recording, please let me know.
Thanks for your suggestions/ideas/comments !
Cheers.
27 Sep
27 Sep
8:29 p.m.
On 09/28/2009 03:36 AM, lanas wrote:
...
1) What is the most easiest-to-setup MIDI/audio
interface for a
laptop ? Fedora 11 will be installed on the laptop.
Then easiest would be Planet CCRMA. From a fresh F11 install, I did
rpm --import
http://ccrma.stanford.edu/planetccrma/RPM-GPG-KEY.planetccrma.txt
and
rpm -Uvh
http://ccrma.stanford.edu/planetccrma/mirror/fedora/linux/planetccrma/11/i3…
then you can browse the repository with yum or packagekit
The laptop will probably be a dual core with 2 to 4 GB
of RAM and some 300
GB hard disk. The screen will probably 16". This will not be a
top-of-the-line laptop.
:rofl: mine's a 1.6Ghz 512Mb RAM 40GB hard disk unit from 2002 but is
still very usable for modest needs, so you should be fine.
8:47 p.m.
On Mon, 28 Sep 2009 08:30:54 +1000,
M Watts <zwy648rct(a)gmail.com> wrote :
On 09/28/2009 03:36 AM, lanas wrote:
...
I know. I've tried launching jack (qjackctl) on both F11 x86_64
worskations and it fails on both, failing to open alsa device or
something like that. Of course, regular sound works on both machines.
I bookmarked a cript I think made by Fernando (CCRMA) to be able to
actually use jacks and I should take a look at it.
Do you run jackd w/o any problems on your F11 installation ?
Cheers.
1) What is the most easiest-to-setup MIDI/audio
interface for a
laptop ? Fedora 11 will be installed on the laptop.
Then easiest would be Planet CCRMA. From a fresh F11 install, I did
rpm --import
http://ccrma.stanford.edu/planetccrma/RPM-GPG-KEY.planetccrma.txt
and
rpm -Uvh
http://ccrma.stanford.edu/planetccrma/mirror/fedora/linux/planetccrma/11/i3…
28 Sep
28 Sep
4:07 a.m.
On måndag 28 september 2009 00:48:13 lanas wrote:
On Mon, 28 Sep 2009 08:30:54 +1000,
M Watts <zwy648rct(a)gmail.com> wrote :
Probably something holding your audio device. jackd want to be the sole owner
of the audio device. For me it's always knotify4 (in this version. probably fixed
in recent kde versions, I hope). I check that with lsof. Example:
~/sound/hydrogen> lsof | egrep snd
knotify4 4247 bengan mem CHR 116,4 5186
/dev/snd/pcmC0D0p
knotify4 4247 bengan mem CHR 116,3 5180
/dev/snd/pcmC0D1p
knotify4 4247 bengan 17u CHR 116,3 0t0 5180
/dev/snd/pcmC0D1p
knotify4 4247 bengan 18r CHR 116,2 0t0 4926
/dev/snd/timer
knotify4 4247 bengan 19u CHR 116,4 0t0 5186
/dev/snd/pcmC0D0p
knotify4 4247 bengan 20u CHR 116,8 0t0 5209
/dev/snd/controlC0
knotify4 4247 bengan 22r CHR 116,2 0t0 4926
/dev/snd/timer
knotify4 4247 bengan 23u CHR 116,4 0t0 5186
/dev/snd/pcmC0D0p
knotify4 4247 bengan 24u CHR 116,8 0t0 5209
/dev/snd/controlC0
kmix 4697 bengan 10u CHR 116,8 0t0 5209
/dev/snd/controlC0
pulseaudi 4970 bengan mem REG 8,6 347800 230684
/usr/lib64/libsndfile.so.1.0.17
pulseaudi 4970 bengan 20u CHR 116,8 0t0 5209
/dev/snd/controlC0
qjackctl 28925 bengan 12u CHR 116,9 0t0 7878
/dev/snd/seq
Or simpler:
~/sound/hydrogen> lsof /dev/snd/pcm*
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
knotify4 4247 bengan mem CHR 116,4 5186
/dev/snd/pcmC0D0p
knotify4 4247 bengan mem CHR 116,3 5180
/dev/snd/pcmC0D1p
knotify4 4247 bengan 17u CHR 116,3 0t0 5180
/dev/snd/pcmC0D1p
knotify4 4247 bengan 19u CHR 116,4 0t0 5186
/dev/snd/pcmC0D0p
knotify4 4247 bengan 23u CHR 116,4 0t0 5186
/dev/snd/pcmC0D0p
Just kill it and try again.
~/sound/hydrogen> killall knotify4
~/sound/hydrogen> lsof | egrep snd
kmix 4697 bengan 10u CHR 116,8 0t0 5209
/dev/snd/controlC0
pulseaudi 4970 bengan mem REG 8,6 347800 230684
/usr/lib64/libsndfile.so.1.0.17
pulseaudi 4970 bengan 20u CHR 116,8 0t0 5209
/dev/snd/controlC0
A bit brutal but it works. It could also be that your trying to start
jackd with realtime priority and don't have a rt-kernel. But I gather
you know that.
/bengan
On 09/28/2009 03:36 AM, lanas wrote:
...
I know. I've tried launching jack (qjackctl) on both F11 x86_64
worskations and it fails on both, failing to open alsa device or
something like that. Of course, regular sound works on both machines.
I bookmarked a cript I think made by Fernando (CCRMA) to be able to
actually use jacks and I should take a look at it. 1) What is the most easiest-to-setup MIDI/audio
interface for a
laptop ? Fedora 11 will be installed on the laptop.
Then easiest would be Planet CCRMA. From a fresh F11 install, I did
rpm --import
http://ccrma.stanford.edu/planetccrma/RPM-GPG-KEY.planetccrma.txt
and
rpm -Uvh
http://ccrma.stanford.edu/planetccrma/mirror/fedora/linux/planetccrma/11/
i386/planetccrma-repo-1.1-2.fc11.ccrma.noarch.rpm 
6:01 a.m.
2009/9/28 Bengt Gördén <bengan(a)bag.org>
A bit brutal but it works. It could also be that your
trying to start
jackd with realtime priority and don't have a rt-kernel. But I gather
you know that.
any sane kernel can do realtime; it's not dependent on kernel. realtime is
dependent on privileges.
what we refer to as an "rt kernel" is basically more (realtime) preemption
and higher timer frequency.
6:17 a.m.
On måndag 28 september 2009 10:01:24 Ray Rashif wrote:
2009/9/28 Bengt Gördén <bengan(a)bag.org>
Yes. Your right. My bad. But that doesn't exclude the the fact that it is
something to have a look at if you're having problem not being able to start
jackd.
/bengan
A bit brutal but it works. It could also be that
your trying to start
jackd with realtime priority and don't have a rt-kernel. But I gather
you know that.
any sane kernel can do realtime; it's not dependent on kernel. realtime is
dependent on privileges.
what we refer to as an "rt kernel" is basically more (realtime) preemption
and higher timer frequency. 
30 Sep
30 Sep
5:04 p.m.
On Sun, 2009-09-27 at 18:48 -0400, lanas wrote:
On Mon, 28 Sep 2009 08:30:54 +1000,
M Watts <zwy648rct(a)gmail.com> wrote :
Hmmm, try the version of jack in the testing repository (enable by
installing planetccrma-repo-testing), that one has a wrapper that
properly suspends pulse audio before trying to open the soundcard.
-- Fernando
On 09/28/2009 03:36 AM, lanas wrote:
...
I know. I've tried launching jack (qjackctl) on both F11 x86_64
worskations and it fails on both, failing to open alsa device or
something like that. Of course, regular sound works on both machines.
I bookmarked a cript I think made by Fernando (CCRMA) to be able to
actually use jacks and I should take a look at it.
Do you run jackd w/o any problems on your F11 installation ? 1) What is the most easiest-to-setup MIDI/audio
interface for a
laptop ? Fedora 11 will be installed on the laptop.
Then easiest would be Planet CCRMA. From a fresh F11 install, I did
rpm --import
http://ccrma.stanford.edu/planetccrma/RPM-GPG-KEY.planetccrma.txt
and
rpm -Uvh
http://ccrma.stanford.edu/planetccrma/mirror/fedora/linux/planetccrma/11/i3…
27 Sep
27 Sep
9:25 p.m.
3) What would be the very smallest MIDI keyboard
available ? I
have an Axiom 25 although something even smaller would be nice.
Korg nanoKey
http://www.korgnano.com/
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11:03 p.m.
Norval Watson wrote:
Another option if you want something slightly bigger more traditional
than the nanoKEY is the Akai LPK25:
http://www.akaipro.com/lpk25
It even has a built-in arpeggiator!
Thanks
Leigh
3) What would be the very smallest MIDI keyboard
available ? I
have an Axiom 25 although something even smaller would be nice.
Korg nanoKey
http://www.korgnano.com/
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28 Sep
28 Sep
4:11 a.m.
On måndag 28 september 2009 01:25:50 Norval Watson wrote:
I've got one. It's a bit of a toy though, but it works when I'm on the move.
/bengan
3) What would
be the very smallest MIDI keyboard available ? I
have an Axiom 25 although something even smaller would be nice.
Korg nanoKey
http://www.korgnano.com/
11:49 p.m.
Thanks for all the comments. The audio recording was not mentioned
however. Is it done through the mic in jack of the laptop ? The use
would be to record accoustic guitar. Or is an audio interface of some
sort used ?
Cheers.
29 Sep
29 Sep
12:19 a.m.
On 09/29/2009 11:49 AM, lanas wrote:
Thanks for all the comments. The audio recording was
not mentioned
however. Is it done through the mic in jack of the laptop ? The use
would be to record accoustic guitar. Or is an audio interface of some
sort used ?
You can get away with a mic->mixer/preamp->onboard mic for recording but
most professionals will get an external card. Either usb or firewire.
It's worth testing the onboard before buying an external to see if it
meets your needs.
Cheers.
Patrick Shirkey
Boost Hardware Ltd
Cheers.
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3 a.m.
lanas wrote:
Thanks for all the comments. The audio recording was
not mentioned
however. Is it done through the mic in jack of the laptop ? The use
would be to record accoustic guitar. Or is an audio interface of some
sort used ?
Cheers.
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Hi,
For modest needs on-board audio cards may be enough, but if you end up
buying an external one see e.g. these links to check Linux compatibility:
http://www.alsa-project.org/main/index.php/Matrix:Main
http://www.ffado.org/?q=devicesupport/list
Regards,
Tapani
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days inactive
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linux-audio-user@lists.linuxaudio.org
12 comments
9 participants
participants (9)
-
Bengt Gördén -
Fernando Lopez-Lezcano -
lanas -
Leigh Dyer -
M Watts -
Norval Watson -
Patrick Shirkey -
Ray Rashif -
Tapani Sysimetsä