8 Nov
2008
8 Nov
'08
5:32 p.m.
Hi list
I have this Midikeyboard here and sustainedals and a behringer midi controller and when
I'm not making music its just switched off.
Do you know any ways to receive midi events to start programms, execute shell-scripts or
using other things you normaly do with your computer-keyboard and shortcuts?
Nils
--
Nils Gey <ilfhi(a)gmx.de>
8 Nov
8 Nov
9:23 p.m.
On Sat, Nov 08, 2008 at 10:31:51PM +0100, Nils Gey wrote:
Do you know any ways to receive midi events to start
programms,
execute shell-scripts or using other things you normaly do with your
computer-keyboard and shortcuts?
Yes.
I've used several methods. One of the most interesting for a while was
rebinding some very high notes on my piano to terminate MIDI capture and
do something with the file. The same technique could be used to fork
off other shell-scripts in your case.
Here is how it worked:
1. a change to arecordmidi to detect certain events, stop recording,
and return a specific exit status to a script, (patch attached),
2. an arecordmidi-loop.sh script (attached) which I would start on my
computer before moving to my piano, it would begin recording MIDI
events to a file named according to the current date and time,
3. some creative playing might ensue, or might not,
4. one key on the piano if pressed would stop recording, discard the
file, and start recording again, this was marked with a yellow sticky as
"discard",
5. another key if pressed would stop the recording, keep the file, and
start recording again, this was marked as "keep",
6. another key would stop the recording, discard the file, and not
start recording again, this was marked as "terminate".
Each response set or cleared an indicator LED on my parallel port driven
indicator array. That's what "pung" was doing. This gave me a visual
indication of current state.
The "discard" and "keep" responses would also briefly play a MIDI
sequence confirming the action ... so I didn't need to watch the screen.
--
James Cameron mailto:quozl@us.netrek.org http://quozl.netrek.org/
9 Nov
9 Nov
4:32 p.m.
Nils Gey <ilfhi(a)gmx.de> writes:
Do you know any ways to receive midi events to start
programms
This is really easy with SuperCollider. This applications has some
really stupid;) ways to work with MIDI, though, that needs some
fixing. It also does not do JACK MIDI.
var p, l;
(
~bcfNoteOffResponder=NoteOffResponder({|src,chan,num,val|
if(src==1310720,
if(chan==0,
{
if(num==14,{//BANK 5,LOWER BUTTON 1
p=Pipe.new("notify-send -t 100000000 -u critical \"ATTENTION:
Jabber\"", "r");
});
});
)};
)
)
--
Esben Stien is b0ef@e s a
http://www. s t n m
irc://irc. b - i . e/%23contact
sip:b0ef@ e e
jid:b0ef@ n n
11:35 p.m.
On Mon, Nov 10, 2008 at 10:22:34AM +0900, Simon Wise wrote:
pd will start shell scripts from midi quite easily
What is pd and where can I find it?
Places checked:
1. aptitude show pd
2. aptitude search pd | grep -i midi
3. http://pd.sourceforge.net/ (invalid)
4. your immediately preceding posts to this mailing list (Feb 23),
5. http://en.wikipedia.org/wiki/Pd which suggests
http://en.wikipedia.org/wiki/Pure_Data
Aha, Pure Data ... is that what you meant?
Hmm, interesting.
--
James Cameron mailto:quozl@us.netrek.org http://quozl.netrek.org/
10 Nov
10 Nov
8:15 a.m.
On Sunday 09 November 2008 22:35:45 James Cameron wrote:
On Mon, Nov 10, 2008 at 10:22:34AM +0900, Simon Wise
wrote:
$ apt-cache search puredata
gem - Graphics Environment for Multimedia - PureData library
pd-aubio - aubio external for PureData
pd-csound - csound external for PureData
puredata - realtime computer music and graphics system
pd will start shell scripts from midi quite
easily
What is pd and where can I find it?
Places checked:
1. aptitude show pd
2. aptitude search pd | grep -i midi
3. http://pd.sourceforge.net/ (invalid)
4. your immediately preceding posts to this mailing list (Feb 23),
5. http://en.wikipedia.org/wiki/Pd which suggests
http://en.wikipedia.org/wiki/Pure_Data
Aha, Pure Data ... is that what you meant?
That's it.
Hmm, interesting.
all the best,
drew
1:15 p.m.
On Saturday 08 November 2008 22:31:51 Nils Gey wrote:
Do you know any ways to receive midi events to start
programms, execute
shell-scripts or using other things you normaly do with your
computer-keyboard and shortcuts?
This is one of the things mididings (http://das.nasophon.de/mididings/) was
made for.
For example, the following Python script would listen on an ALSA MIDI port,
and run different shell commands in response to note-on events:
from mididings import *
run(
Filter(NOTEON) >> KeySplit({
60: System('foo'),
61: System('bar'),
...
})
)
11 Nov
11 Nov
6:53 p.m.
On Mon, Nov 10, 2008 at 06:08:41PM +0100, Dominic Sacré wrote:
On Saturday 08 November 2008 22:31:51 Nils Gey wrote:
I haven't used Python in a while, but what does that ">>" syntax do? A
binary shift right?
-ken
Do you know any ways to receive midi events to
start programms, execute
shell-scripts or using other things you normaly do with your
computer-keyboard and shortcuts?
This is one of the things mididings (http://das.nasophon.de/mididings/) was
made for.
For example, the following Python script would listen on an ALSA MIDI port,
and run different shell commands in response to note-on events:
from mididings import *
run(
Filter(NOTEON) >> KeySplit({
60: System('foo'),
61: System('bar'),
...
})
)
9:59 p.m.
On Tuesday 11 November 2008 23:59:04 Ken Restivo wrote:
On Mon, Nov 10, 2008 at 06:08:41PM +0100, Dominic
Sacré wrote:
Well, yes and no... For integers it would do a binary shift, but in Python
operators can be overloaded for user-defined types. With mididings, A >> B
means "connect B to A".
In the example above, all incoming MIDI events first go through a filter
that removes anything except note-on events. The remaining events are then
split by note number, so that each key runs a different command.
The idea behind mididings is that you use Python to define how MIDI events
are processed by connecting different "units". But all Python code is
(usually) run at startup. Once event processing is started, this is done
completely in C++, mainly because of latency and realtime safety.
Dominic
On Saturday 08 November 2008 22:31:51 Nils Gey
wrote:
I haven't used Python in a while, but what does that ">>" syntax do?
A
binary shift right? Do you know any ways to receive midi events to
start programms,
execute shell-scripts or using other things you normaly do with your
computer-keyboard and shortcuts?
This is one of the things mididings (http://das.nasophon.de/mididings/)
was made for.
For example, the following Python script would listen on an ALSA MIDI
port, and run different shell commands in response to note-on events:
from mididings import *
run(
Filter(NOTEON) >> KeySplit({
60: System('foo'),
61: System('bar'),
...
})
)
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linux-audio-user@lists.linuxaudio.org
8 comments
7 participants
participants (7)
-
Dominic Sacré -
drew Roberts -
Esben Stien -
James Cameron -
Ken Restivo -
Nils Gey -
Simon Wise