Re: accessing midisport 2x2 using ALSA & MIDI::Music...

On Thu, 7 Dec 2006 22:31:38 -0500, [email protected] ("Rick Bolen")
wrote:

>I'm trying to get MIDI::Music to send midi data out to the USB connected
>Midisport 2x2. Ifinally got the Midisport initialized via hotplug and
>firmware dowloading, but...
>
>I'm using alsa on Debian testing, and MIDI::Music wants to write to

MIDI::Musis says it needs OSS, not alsa.

>/dev/music (which doesn't exist). I tried creating symlinks from /dev/music
>to /dev/midi[0-3] but MIDI::Music still can't find the port.
>
>Any way to get the data moving?
>Rick
This is from testing a few years ago, I don't have a setup right now
to test, but..............

If you just want to test the USB connection, it usually is device 5.
This script uses MIDI::Realtime to play keys from the computer
keyboard, but you can assign midi_device = 5 and maybe modify the
loop, to get input from the midi keyboard.

Also do "amidi -h" and google for amidi, to see how to do it
with amidi.

#!/usr/bin/perl
use warnings;
use strict;
use MIDI::Realtime;
use Term::ReadKey;

ReadMode('cbreak');

#this works on linux with an SBlive, Alsa 1.0.4, kernel 2.4.22
# on my system, it has a bug when usb-hotplug and usb-midi are used
# and the hotplug-blacklist is not setup properly

my $midi = MIDI::Realtime->new(dev=>'/dev/sequencer',
                               midi_device=> 5); #1,2,3,4
                                      #5 for external keyboard 
                                     #thru USB UM-1 connector

while(1){
my $char;
if (defined ($char = ReadKey(0)) ) {
        print ord($char),"\n";    # input was waiting and it was $char
        
	$midi->patch(ord($char)); #change instrument, 127 gives
"exploding keyboard" :-)
	$midi->note(50,1,127); #play note

} else {
          # no input was waiting
        }
}


ReadMode('normal');                  # restore normal tty settings

__END__


to send to the keyboard

#!/usr/bin/perl
use warnings;
use strict;
use MIDI::Realtime;
use diagnostics;

#works 
my $midi = MIDI::Realtime->new(dev=>'/dev/sequencer',
                               midi_device=> 5); #1,2,3,4
                                            #5 is USB midi
# Play note 47 with maximum velocity on channel 1
$midi->note(47,1,127);

# Now have some fun with randomness

my @notes      = (37 .. 50);
# use all the channels (with extra drums)
my @channels   = (1 .. 16, 10, 10, 10);
my @velocities = (70 .. 100);

for (0 .. 127) {
  $midi->note($notes[rand(@notes)],
  $channels[rand(@channels)],
  $velocities[rand(@velocities)]
);

# Wait for a tenth of a second
select(undef,undef,undef, 0.10);
}
__END__







-- 
I'm not really a human, but I play one on earth.
http://zentara.net/japh.html