Hi.
I made many photos of the building, including some
nice panoramas. The pics are at resolution 1024x768 or
1600x1200 and if you want, I can stitch some
panoramas.
Paul
Greetings:
I've prepared a brief report on LAC 2005 for the
Linux Journal, it's
ready for submission but I need an outside
On Tue, 2005-06-07 at 19:34 -0500, Jan Depner wrote:
On Tue, 2005-06-07 at 19:20, Dave Robillard wrote:
Premature optimization is the root of all evil. Using C arrays and
strings for no reason when a much more robust higher level type would
suffice is /just as stupid/ as always using slow
On Wed, Jun 08, 2005 at 10:20:01AM +1000, Dave Robillard wrote:
Premature optimization is the root of all evil.
That's by Donald Knuth IIRC. Most of wht I know about programming
(I mean relevant things, not language or system nitty-gritty), comes
from hist ACP series of books, and I'd agree
On Wed, Jun 08, 2005 at 09:50:42AM +0100, Simon Jenkins wrote:
Suppose I sum a vector of 5 million integers and it takes 6 seconds. And
assume - (generously![1]) - that I switch to using an array and now it
only takes 1 second. Hmmm... a 6 * speedup! So I look to see where else
my code could
This is, I know, slightly off-topic for this group, as it does not deal
with audio per se. It does, however, deal with the
real-time/preemptible Linux kernel, for which I think most of the
expertice is gathered here.
The OS is Linux, the computer an ordinary PC. The task we are faced with
is
Paul Davis [EMAIL PROTECTED] wrote:
i'll leave making things as fast as possible to intel, AMD and the gcc team.
When I read this when you posted this the first time, I thought: and
what about PPC? But now, after Steve Jobs WWDC keynote, it turns out
that your omission of PPC was visionary :-)
On Wed, Jun 08, 2005 at 07:19:56AM -0400, Paul Davis wrote:
the nice thing about a
design pattern like STL containers is that you can toggle back and
forth between any all of them with almost no work. i can't count how
many times in ardour i have changed:
typedef vectorFoo Foos;
to
Greetings:
Many thanks to Burkhard Woelfel and Paul Nasca for your kind offers,
but ZKM came through with a very nice publicity shot of the Kubus.
Btw, the LAC2005 report will appear in the Linux Journal in August or
September. It's just a brief report, nothing new to the members of this
Again, valid point. But algorithmic design IMHO includes the selection
of the right data structures and interfaces in function of the required
data / time complexity.
absolutely.
As to assembler, I've no problem with it per se - you can write well
[ ... ]
In both cases, we're probably talking
As far as data volumes go, for your 5 million integers, you're off by about
5
orders of magnitude ;-) So, now that 5ms just became 500 seconds. Yes, my
users do notice and appreciate that time savings ;-)
Jan
Sooo. if you stored this stuff on punched paper tape it would be long
enough to
Hi Florian,
Florian Schmidt wrote:
For quick tests without libDSP you can tweak the jack_convolve Makefile
a little:
uncomment the
#COMPILE_FLAGS += -DC_CMUL
line and remove -ldsp from the LINK_FLAGS line. This will use an
unoptimized C complex multiplication implementation. jack_convolve
On Wed, Jun 08, 2005 at 09:12:05AM -0400, Paul Davis wrote:
SAWstudio is a pretty full-featured DAW that is, AFAIK, written almost
entirely in x86 assembler. Its blazingly fast and yet dinosaur like at
the same time, from what I hear.
Reminds me of the original version of Sibelius (the music
Message: 10
Date: Wed, 08 Jun 2005 15:57:23 +0200
From: Olivier Guilyardi [EMAIL PROTECTED]
Subject: Re: [linux-audio-dev] Re: Software controller for homemade
edrums
To: The Linux Audio Developers' Mailing List
linux-audio-dev@music.columbia.edu
Message-ID: [EMAIL
[EMAIL PROTECTED] (Asbjørn Sæbø) writes:
* Will an ordinary program, run as root, take advantage of the real time
capabilities of the kernel?
No.
* Will an ordinary program, run as a user that is a member of the
audio group on f.i. Agnula, take advantage of the real-time capabilities?
Greetings:
While waiting for another box I decided to pull the RAM and test each
stick (256 MB each). The problem occurred with either stick. I'm able to
log in, work for a few minutes, then the box just freezes. I can hear
the disk drive make a little activity noise first, then
On Wed, 2005-06-08 at 14:08 +0200, Alfons Adriaensen wrote:
typedef listFoo Foos;
Valid point, there are occasions where you can do this sort of thing.
But when we are talking about large data sets and heavy use, it could
lead to some nasty surprises. For small data sets, it doesn't
On Wed, 2005-06-08 at 05:47 -0700, [EMAIL PROTECTED] wrote:
I'm working with multibeam sonar, airborne topographic and hydrographic
LIDAR, and airborne hyperspectral imagery data.
Sonar and radar applications are very familiar to me. There is no reason
why those couldn't be very efficient,
Hi Ben,
Ben Loftis wrote:
From: Olivier Guilyardi [EMAIL PROTECTED]
Okay, so I now have an idea of what convolution is. Your little piece of
software is very nice, very easy to understand. I used three samples : a
bassdrum, a snare drum, and a short guitar chord. I plugged the output
of one of
I forgot to give a link to the guitar chord sample I used with jack_convolve.
Here it is : http://samalyse.com/labs/edrum/audio/chord.wav
Regards
--
og
On Wed, 2005-06-08 at 22:09 +0300, Jussi Laako wrote:
And you can still access the individual samples by using vData[n]
without significant performance penalty compared to a simple float
array. And I say significant here just because it also performs bounds
checking. It could be made even
On Wednesday 08 Jun 2005 21:45, [EMAIL PROTECTED] wrote:
then processing speed becomes extremely important. There have been
some very good points made in this discussion and I will definitely
investigate some of them. My problem here is that I've heard the
same type of thing from companies
On Wednesday 08 Jun 2005 21:35, Jussi Laako wrote:
You can derive a new class from the template and overload the []
operator to perform exactly same as in C. After compilation the
result is the same no matter if the template or C array is used.
Are you sure this is still true in the gcc world,
And, as I said above, it did work better with some samples than with
others, but: it works :-)
Here are three example of what it sounds like, using a modified guitar
chord sample as response file :
1 - For this one I softly hit the edge of the pad continuously, and the
middle of the edge
[Simon Jenkins]
...which your Descriptor template can pick up without using any
specialisation like this:
template class T
class Descriptor
: public DescriptorStub
{
public:
Descriptor() { UniqueID = T::UniqueID; }
...
};
Just a thought.
And a good one, thanks. Set me thinking and I
I believe the C++ standard specifies that vector uses contigous memory and
that v[0] returns a valid pointer to an array.
Taybin
-Original Message-
From: Chris Cannam [EMAIL PROTECTED]
Sent: Jun 8, 2005 4:41 PM
To: linux-audio-dev@music.columbia.edu
Cc: Jussi Laako [EMAIL PROTECTED]
Ben Loftis wrote:
As you may see, scratching seems to work fine in here :-)
This is so incredibly cool! Is this technique already in wide use somewhere
that I missed? Because if not, it should be. This means that all you need
for an electronic drum set is a multichannel sound card and
On Wed, Jun 08, 2005 at 10:32:38PM +0200, Jens M Andreasen wrote:
On Wed, 2005-06-08 at 15:22 -0400, Dave Phillips wrote:
Greetings:
While waiting for another box I decided to pull the RAM and test each
stick (256 MB each). The problem occurred with either stick. I'm able to
log in,
Could anyone point me toward a document explaining the
technical/mathematical details of convolution, especially about audio?
I've used convolution/correlation/fourier analysis for school projects. The
standard text for Fourier analysis is Bracewell, The Fourier Transform and
its
--- Clemens Ladisch [EMAIL PROTECTED] wrote:
sound card by sending it the same commands that I
What kind of messages are these?
The USB snooper lists them all as CONTROL_TRANSFER.
Are there any standard ioctl() calls in the
No, but this would be a very good idea for testing
purposes.
Use the Source, Luke!
As far as I seen (not far, really), it does not
allow to send custom
messages. But nobody stops you from extending the
driver a bit ;)
Ugh! I was hoping to avoid programming in kernel mode.
Contrary to some, I prefer to stay away from the dark
side :-). And a more
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