aconnect
ALSA sequencer connection manager
see also :
aseqnet
Synopsis
aconnect
[-d] [-options] sender receiver
aconnect -i|-o [-options]
aconnect -x
add an example, a script, a trick and tips
examples
source
DST=$(aconnect -o | grep "'aeolus'" | grep -o '[0-9]*'):0
sleep 1
aconnect $SRC $DST
source
echo "Execute something
like 'aconnect 16:0 128:0' after this script."
timidity -iA -B2,1 -Os -A120 --realtime-priority=1
source
then
aconnect `~/waitalsaports-jv80
FreeWheeling`
aconnect `~/waitalsaports-pcr
FreeWheeling`
else
else
aconnect `./waitalsaports
FreeWheeling`
fi
# SYSTEM_MIDI=`echo $FWEELIN_MIDI_PORTS | awk '{
print $1 }'`
source
JM=`$JACK_LSP 2>/dev/null |
grep setBfree:midi_in`
AM=`aconnect -o -l 2>/dev/null | grep
setBfree | sed 's/^client
\([0-9]*\):.*$/\1/'`
while test -z
"$AM" -a -z "$JM"
-a $TIMEOUT -gt 0 ; do
AM=`aconnect -o -l 2>/dev/null | grep
setBfree | sed 's/^client
\([0-9]*\):.*$/\1/'`
sleep 1; TIMEOUT=$[ $TIMEOUT - 1 ];
description
aconnect
is a utility to connect and disconnect two existing ports on
ALSA sequencer system. The ports with the arbitrary
subscription permission, such as created by
aseqview(1), can be connected to any (MIDI) device
ports using aconnect. For example, to connect from
port 64:0 to 65:0, run as follows:
The connection
is one-way, and the whole data to the sender port (64:0) is
redirected to the receiver port (65:0). When another port
(e.g. 65:1) is attached to the same sender port, the data is
sent to both receiver ports. For disconnection, use
-d option.
% aconnect -d 64:0 65:0
The address can
be given using the client’s name.
% aconnect External:0 Emu8000:1
Then the port 0
of the client matching with the string "External"
is connected to the port 1 of the client matching with the
"Emu8000".
Another
function of aconnect is to list the present ports on
the given condition. The input ports, which may become
sender ports, can be listed with -i
option.
% aconnect -i
client 0: ’System’ [type=kernel]
0 ’Timer ’
1 ’Announce ’
client 64: ’External MIDI-0’ [type=kernel]
0 ’MIDI 0-0 ’
Similarly, to
see the output ports, use -o flag.
You can remove
all existing exported connections using -x
option. This function is useful for terminating the ALSA
drivers, because the modules with sequencer connections
cannot be unloaded unless their connections are removed.
options
CONNECTION
MANAGEMENT
-d, --disconnect
Disconnect the given
subscription.
-e,
--exclusive
Connect ports with exclusive
mode. Both sender and receiver ports can be no longer
connected by any other ports.
-r, --real
queue
Convert time-stamps of event
packets to the current value of the given real-time
queue. This is option is, however, not so useful, since the
receiver port must use (not necessarily own) the specified
queue.
-t, --tick
queue
Like -r option,
but time-stamps are converted to the current value of the
given tick queue.
LIST PORTS
-i, --input
List existing input (readable)
ports. This option is exclusive to -o.
-o,
--output
List existing output (writable)
ports. This option is exclusive to -i.
-l,
--list
List the current connection
status. The connected and connecting ports from/to each port
are listed together. The suffix flag [ex] means the
connection is exclusive. The suffix flag [real:#] and
[tick:#] mean the connection includes real-time and
tick conversion on the listed queue, respectively.
REMOVE ALL
CONNECTIONS
-x, --removeall
Remove all exported
connections.
see also
aseqnet ,
aseqview
author
Takashi Iwai
<tiwai[:at:]suse[:dot:]de>