hi everybody!
the Linux Audio Conference 2010 (hosted this year by the Hogeschool voor
de Kunsten, Utrecht) will have live streaming coverage of all the paper
presentations and selected workshops, just like in the old days. the
streams will be available via http://streamer.stackingdwarves.net and at
least two other relays, which will be announced as they come online.
for remote participants, there is an IRC channel called #lac2010 on
irc.freenode.net, which serves as a backchannel for your questions and
comments, hangout for conference chatter, and helpdesk for any streaming
troubles you might encounter.
spread the word, and join the fun. LAC 2010 takes place from may 1st to
may 4th. test streams will be made available a few days in advance. the
IRC channel is already open.
the official lac site is at http://lac.linuxaudio.org/2010/.
best regards, on behalf of the stream team,
jörn
On Mon, April 12, 2010 00:38, James Morris wrote:
> Hi,
>
> I'm pretty sure I've seen this dealt with on the list before, but can't
> find it.
>
> With the program I'm fumbling around trying to create, it will be possible
> for successive note on events for the same pitch to occur without note off
> events intervening.
>
> Does the MIDI spec allow such things?
Sorry to answer myself so soon...
I guess it is allowed. The simplest case being a sequencer outputting to
the same channel and port as a keyboard player. Nothing can prevent this -
right?
And there's no way in the world that missing note-offs could be added in,
in a fashion guaranteed to cover all possible permutations of connections,
or without delaying the note-on which implies a missing note-off.
James.
> The bash-script prototype of the program did this, and, I believe, the
> soft-synths used, acted appropriately - that is, re-triggered the notes.
> So I guess the question is, does it make any difference if I add-in the
> note-off events - which, thinking about it, is going to be tricky because,
> basically, although the program is sequencing, it will be real time and is
> not psychic!
>
>
> Cheers,
> James.
>
> _______________________________________________
> Linux-audio-dev mailing list
> Linux-audio-dev(a)lists.linuxaudio.org
> http://lists.linuxaudio.org/listinfo/linux-audio-dev
>
On Mon, April 12, 2010 12:47, James Morris wrote:
> 2) when a missing note-off detected, delay the note-on by the smallest
> amount of time possible, and insert the note-off in place of it.
Any thoughts on that?
Or send a note-off for pitch n followed by a note on for pitch n within
the same MIDI data stream?
For the sake of pretending correctness?
James.
Hello!
so as has been suggested on LAU, I moved this discussion back on-list, but
thought it would be more relevant to the LAD than LAU for obvious reasons.
Maybe some general points. Blind or visually impaired people most work with
one of these technologies: Braille display, Speech synthesis (text-to-speech)
or magnifier. The latter is, I think, the easiest to accomodate, as GNOME and
basic X!! offers screen mags.
Braille displays and speech synths are in general one dimensional tools.
Both can work with graphics, yet there are restrictions.
1. The only project for both braille and TTS for GUIs I know is Orca, which
needs Gnome/GTK. I suppose it's also relying on standard widgets. Then there
is the fact, that I'm not certain about its usability/stability. A few win and
linux users, I know, said, that Orca is far from comfortable, in comparison to
windows solutions.
2. Graphics rely on 2-dimensionality. That's - in my books - all it's about.
It's designed for the sighted person, being able to use his field of vision,
other markers than only text to transport information to the user.
Speech ingeneral is - again only from my point of view - not very suitable
for audio, for obvious reasons again. I got festival to work with JACK, but
it's not nice and not everyone using speech, has two soundcards, to make it
really convenient. But that's just an aside.
So seeing all this, the best way to interact is the console/CLI interfaces.
The best amongst these are readline interfaces. Applications, which look like
shells. to make this really helpful and nice (the equivalent of eye-candy) a
nice kind of online help is forunite. A good example - not to say superb - is
Nama. You have the command help. It works with category names, category
numbers, keywords and actual commandnames. That's really taking it to the
height of convenience and comfortability.
A short note about ReadLine. It's written in C, for those, who haven't yet
seen/used it. There is a c++ wrapper called rlmm, which hasn't seen
development for some time, as far as I'm aware. Yet Readline hasn't changed
it's interface drastically, I believe. Readline itself offers two ways of
usage: Directly or via callback-functions. This is what rlmm uses. rlmm is
also GPL, so if you don't want to use it as an external reference, I'm sure
you can include it in your code, modify it to your liking. I remember, that it
isn't big.
Another way to interface is ncurses (with menus and forms and all the rest).
Yet that can be tricky. You have to take care of the cursor (the hardcursor!)
Always moving it to the current element. Don't rely on seeintg attributes.
Braille displays like to attach to the real cursor and focus on it by default,
which is good, because , where the cursor is, there should be the action and
it's easy to follow it (I think). I also think, the same applies for TTS
systems. So with ncurses you'd have to take care of some restrictions beyond
the library itself.
One other of these restrictions (for comfort) would be to draw progressbars
or percentage bars - like in a mixer - horizontally. That's the way a braille
display is oriented.
Most braille displays have 40 characters, there are those with 80
characters, but they're mostly designed for home or workplace systems. The 40
character displays can serve nicely at home (most of the blind people I know,
have one) and they can easily fit under a laptop. And I believe they are
cheaper, so the health insurance, which mostly pays for it, is happier with
it. :-)
Applications, which have both GUIs and CLIs are: Aeolus (restricted CLI, yet
helpful). But Fons relies - I seem to remember - on his own UI-classes. Still,
he makes use of callback functions, if I'm right. Nama is written in Perl, it
also offers both a GUI and a CLI. Yet I'm not completely sure, how much
interconnection there is between the two. I believe, they are quite seperate.
There's links2, which I think has both CLI and GUI, it's a web-browser, and
should be available as packages on all major distros. It uses ncurses for
displaying information. The SuSE Yast2 system, has both an ncurses and a
graphical interface. But the ncurses interface is nothing to show off, to a
blind person at least. (Last seen 2005/06, so that MAY have changed).
And now I'm open to specific questions.
Kindly yours
Julien
--------
Music was my first love and it will be my last (John Miles)
======== FIND MY WEB-PROJECT AT: ========
http://ltsb.sourceforge.net
the Linux TextBased Studio guide
======= AND MY PERSONAL PAGES AT: =======
http://www.juliencoder.de
Hi,
I'm pretty sure I've seen this dealt with on the list before, but can't
find it.
With the program I'm fumbling around trying to create, it will be possible
for successive note on events for the same pitch to occur without note off
events intervening.
Does the MIDI spec allow such things?
The bash-script prototype of the program did this, and, I believe, the
soft-synths used, acted appropriately - that is, re-triggered the notes.
So I guess the question is, does it make any difference if I add-in the
note-off events - which, thinking about it, is going to be tricky because,
basically, although the program is sequencing, it will be real time and is
not psychic!
Cheers,
James.
0.056 2010-04-12 reinstates PADsynth functionality - a stuff up in XMLwrapper::getparbool(); no other changes worth mentioning.
<http://sourceforge.net/projects/yoshimi/files/>
and that one was really horrible to find ... educational though :-(.
Hiho,
is Jack working on this processor:
CORTEX A8 ARM
?
I'm looking at this board right now:
http://www.igep-platform.com/
There is an Ubuntu available for it...
sincerely,
Marije
Some updates on <http://www.kokkinizita.net/linuxaudio/downloads>
jconvolver-0.8.7
Bugfixes to fconvolver, now exits cleanly.
Thanks to Joern Nettingsmeier for reporting this bug.
zita-resampler-0.1.1
Library is not changed, new version of the audio file
resampling application.
For 16-bit output 'resample' now supports dithering:
rectangular, triangular or 'noise shaped' using the
Lipschitz filter.
Enjoy !
--
FA
O tu, che porte, correndo si ?
E guerra e morte !
Recently the -M switch was added to jack1 as a means to independently
set the jackmidi buffer size. (and it works well, i hasten to add.)
Is this also true for the netjack driver in jack1?
Can we independently set the jackmidi buffer on a netjack slave in the
command line?
Alex.
--
www.openoctave.org
midi-subscribe(a)openoctave.org
development-subscribe(a)openoctave.org
