I have hrtimer support compiled into my kernel, but when I watch 'top'
while music is playing I can see that 'timer' uses CPU cycles but
'hrtimer' never does. How can I find out if ALSA is using hrtimer?
- Grant
In the interest of drawing moustaches upon music, and in commemoration of recent atrocities alluded to in a surreal LAU thread (BP destroying the Gulf of Mexico, IDF raiding protest ship, central banks raiding Greece, Spain, the USA, and everywhere, and the people who died or will die due to many of the above), and lesser atrocities committed upon the New Model Army by Swinger, I submit my own atrocity which was committed using Fluidsynth, JACK-RACK, Calf plugins, and Ardour:
http://storage.restivo.org/music/krmusic/semipublished/bachatrocity-mixed.o…
The environmental sounds are of the coast of the Pacific Ocean, not of the sites of the atrocities on the Gulf of Mexico or the Mediterranean, but you get the general drift. One ocean, one people, one planet, all that. The bassline is from Bach, and the rest of it, unfortunately, is fully my fault.
Oh yeah, moustache too:
http://storage.restivo.org/images/Johann_Sebastian_Bach.jpg
And apologies to Hubert Laws too-- his version was actually good.
I will take this down soon-- mainly because it sucks-- so if you have any interest in keeping it, download it within a week or so.
-ken
Weird, somehow my message did not make it?
Best,
Jeremy
-------- Original Message --------
Subject: Re: [LAU] xruns on ubuntu w edirol FA101
Date: Fri, 04 Jun 2010 18:06:27 +0200
From: Jeremy <jeremy(a)autostatic.com>
To: linux-audio-user(a)lists.linuxaudio.org
References: <4C092284.6090807(a)email.dk>
Atte André Jensen wrote:
> Hi
>
> A friend of mine has just installed ubuntu with a little phone support
> from me. The changes we did were:
>
> 1) Add him to the audio group /etc/udev/rules.d/40-permissions.rules
> 2) Add the following to
> KERNEL=="raw1394", GROUP="audio"
> KERNEL=="dv1394*", GROUP="audio"
> KERNEL=="video1394*", GROUP="audio"
> 3) Install a realtime kernel
>
> However he still reports that jack exits after about 10s with buffersize
> 128 and he get's lots of xruns on larger buffer settings (I think even
> on 1024).
>
> This surprises me, since I run standard ubuntu (recently installed the
> realtime kernel, though) with no xruns on buffersize 128 with an FA66.
>
> Is there anything I forgot in my over-the-phone instructions? Other
> ideas on how to narrow this down?
>
> NB: I don't his computer, but according to him, it's an "old laptop"...
>
Hello Atte,
First thing that pops up in my mind is CPU frequency scaling (disabling
the Ondemand service), but apparently it's an old laptop so maybe it
doesn't apply.
And Firewire can be very picky when it's an onboard Firewire chipset. If
so it could share an IRQ and then you most probably have to use rtirq to
get it running in a stable way.
Best,
Jeremy
Some people might be interested in this but it's pretty far off topic
other than I wrote it.
My new webapp. http://wowsia.com/index.php?ar=1
Might be good for wasting some time on a weekend. Who knows maybe I'll get
rich and be able to invest in some more audio gear and/or afford to spend
some more time on my Linux software.
--
Patrick Shirkey
Boost Hardware Ltd.
Hi
A friend of mine has just installed ubuntu with a little phone support
from me. The changes we did were:
1) Add him to the audio group /etc/udev/rules.d/40-permissions.rules
2) Add the following to
KERNEL=="raw1394", GROUP="audio"
KERNEL=="dv1394*", GROUP="audio"
KERNEL=="video1394*", GROUP="audio"
3) Install a realtime kernel
However he still reports that jack exits after about 10s with buffersize
128 and he get's lots of xruns on larger buffer settings (I think even
on 1024).
This surprises me, since I run standard ubuntu (recently installed the
realtime kernel, though) with no xruns on buffersize 128 with an FA66.
Is there anything I forgot in my over-the-phone instructions? Other
ideas on how to narrow this down?
NB: I don't his computer, but according to him, it's an "old laptop"...
--
Atte
http://atte.dkhttp://modlys.dk
Atte André Jensen <atte(a)email.dk> wrote:
> A friend of mine has just installed ubuntu with a little phone support
> from me. The changes we did were:
>
> 1) Add him to the audio group /etc/udev/rules.d/40-permissions.rules
> 2) Add the following to
> KERNEL=="raw1394", GROUP="audio"
> KERNEL=="dv1394*", GROUP="audio"
> KERNEL=="video1394*", GROUP="audio"
> 3) Install a realtime kernel
>
> However he still reports that jack exits after about 10s with
> buffersize 128 and he get's lots of xruns on larger buffer settings (I
> think even on 1024).
>
> This surprises me, since I run standard ubuntu (recently installed the
> realtime kernel, though) with no xruns on buffersize 128 with an FA66.
>
> Is there anything I forgot in my over-the-phone instructions? Other
> ideas on how to narrow this down?
>
> NB: I don't his computer, but according to him, it's an "old laptop"...
>
I had to set periods/buffer to 3 on my laptop (the default was 2). I
don't think jack exited when I had the default setting on, but it got
lots of xruns and playback was *really* rough.
HTH,
Nick
Hey,
Just wondering if anyone living in the Gulf of Mexico area has been
experiencing any unusual noise in their audio recordings recently?
Cheers.
--
Patrick Shirkey
Boost Hardware Ltd.
I saw the recent thread about beat detection and recalled having seen
this link but didn't check it out.
Don't know how it is done, perhaps I'm wrong about it using beat
detection, the result is really quite amazing though :-)
Apparently all done in python:
http://musicmachinery.com/2010/05/21/the-swinger/
/Robert
On Wednesday 02 June 2010 04:40 pm, Chris Cannam wrote:
> I just played some of these clips to my wife and found (to my
> surprise) that she couldn't bear to listen to them.
My non-musically-inclined girlfriend almost peed herself laughing at
"Afternoon Delight" (one of the songs uploaded to knifa's site). Sometimes
it's funny even if you're not a music nerd.
If I had the code, I'd probably be trying to write a "de-swinger" to see if
the opposite effect would be as amusing on songs like "Truckin'" or any
number of big band standards. But to be honest, I think the coolest uses
of code like this would involve remixes.
Rob
