El Lun 08 Jul 2002 12:40, Takashi Iwai escribió:
> At Fri, 5 Jul 2002 19:30:42 +0200,
> Pedro Lopez-Cabanillas wrote:
> > with /dev/midi00 ouput goes to ens-1371, /dev/midi01 goes to the first
> > usb midi device, and /dev/midi02 goes to the second, but both usb devices
> > have 2 inputs ans 2 outputs. Can I get all my five midi ports work with
> > oss midi emulation?
>
> do you really need to use oss midi devices?
> as long as you only reading/writing midi byte streams (i.e. no
> ioctls), you can use simply alsa rawmidi devices, /dev/snd/midiCxDx,
> instead of /dev/midiXX.
No, I agree with you. In fact, I don't need the raw midi devices at all, as
the sequencer API can do all and more.
My question was if I made a mistake or I am forgiving something, or if it is a
limitation on ALSA OSS emulation. Only trying to deeply test the new
snd-usb-midi driver. And for the fun of doing the things in several different
ways.
As an example, and only for fun, this is a bash script for cron (hourly, of
course) that plays thru raw midi devices without any special program.
Best regards,
Pedro
#!/bin/bash
#
# London Tower Big Ben tune as a simple bash script
# Copyright (C) 2002 Pedro Lopez-Cabanillas
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
tune="C 4, E 4, D 4, g 2, C 4, D 4, E 4, C 2, \
E 4, C 4, D 4, g 2, g 4, D 4, E 4, C 2,"
mididev="/dev/midi03"
tempo=80 # quarters per minute
function playnote() {
let "ms = 240000 / ($2 * $tempo)"
echo -ne '\x90' >&3
echo -ne "$1\144" >&3
sleep $ms'e-3s'
echo -ne '\x80' >&3
echo -ne "$1\000" >&3
}
function playtune() {
echo $1 | tr "cdefgabCDEFGAB" "<>@ACEGHJLMOQS" | \
while read -rd, note length; do
playnote $note $length
done
}
function playhour() {
h=`date +%l`
while [ $h -gt 0 ]; do
playnote $'\x37' 2
let "h--"
done
}
if [ -c $mididev -a -w $mididev ]; then
exec 3>$mididev
echo -ne '\xb0\x07\x7f' >&3 # volume = 127
echo -ne '\xc0\x0e' >&3 # instrument = bells
playtune "$tune"
sleep 2
playhour
exec 3<&-
else
echo "`basename $0` : invalid MIDI device ( $mididev )"
fi
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