aconnect man page on Oracle

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aconnect(1)							   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  per‐
       mission, 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  mod‐
       ules with sequencer connections cannot be unloaded unless their connec‐
       tions 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  use‐
	      ful,  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 connect‐
	      ing 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)

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