.TH aconnect 1 "August 31, 2000"

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.SH NAME

aconnect \- ALSA sequencer connection manager

.SH SYNOPSIS

.B aconnect

[\-d] [\-options] sender receiver

.br

.B aconnect

\-i|\-o [\-options]

.br

.B aconnect

\-x

.SH DESCRIPTION

.B 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

.B aseqview(1),

can be connected to any (MIDI) device ports using

.B aconnect.

For example, to connect from port 64:0 to 65:0, run as follows:

.IP "" 4

% aconnect 64:0 65:0

.PP

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

.B \-d

option.

.sp

.EX

% aconnect \-d 64:0 65:0

.EE

.PP

The address can be given using the client's name.

.sp

.EX

% aconnect External:0 Emu8000:1

.EE

.PP

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".

.PP

Another function of

.B aconnect

is to list the present ports

on the given condition.

The input ports, which may become

.I sender

ports, can be listed with

.B \-i

option.

.sp

.EX

% aconnect \-i

client 0: 'System' [type=kernel]

    0 'Timer           '

    1 'Announce        '

client 64: 'External MIDI\-0' [type=kernel]

    0 'MIDI 0\-0        '

.EE

.PP

Similarly, to see the output ports, use

.B \-o

flag.

.PP

You can remove all existing exported connections using

.B \-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.

.SH OPTIONS

.SS CONNECTION MANAGEMENT

.TP

.B \-d, \-\-disconnect

Disconnect the given subscription.

.TP

.B \-e, \-\-exclusive

Connect ports with exclusive mode.

Both sender and receiver ports can be no longer connected by any other ports.

.TP

.B \-r, \-\-real queue

Convert time-stamps of event packets to the current value of the given

.I real-time

queue.

This is option is, however, not so useful, since

the receiver port must use (not necessarily own) the specified queue.

.TP

.B \-t, \-\-tick queue

Like

.B \-r

option, but 

time-stamps are converted to the current value of the given

.I tick

queue.

.SS LIST PORTS

.TP

.B \-i, \-\-input

List existing input (readable) ports.

This option is exclusive to

.B \-o.

.TP

.B \-o, \-\-output

List existing output (writable) ports.

This option is exclusive to

.B \-i.

.TP

.B \-l, \-\-list

List the current connection status.  The connected and connecting ports

from/to each port are listed together.

The suffix flag

.B [ex]

means the connection is exclusive.

The suffix flag

.B [real:#]

and

.B [tick:#]

mean the connection includes real-time and tick conversion on the listed

queue, respectively.

.SS REMOVE ALL CONNECTIONS

.TP

.B \-x, \-\-removeall

Remove all exported connections.

.SH "SEE ALSO"

aseqnet(1), aseqview(1)

.SH AUTHOR

Takashi Iwai <tiwai@suse.de>