Provided by: alsa-utils_1.2.2-1ubuntu2.1_amd64 bug


       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)