aconnect(1)                 General Commands Manual                aconnect(1)

       aconnect - ALSA sequencer connection manager

       aconnect [-d] [-options] sender receiver
       aconnect -i|-o [-options]
       aconnect -x

       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:

           % aconnect 64:0 65:0

       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.

       -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.

       -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.

       -x, --removeall
              Remove all exported connections.

       aseqnet(1), aseqview(1)

       Takashi Iwai <>

                                August 31, 2000                    aconnect(1)