Man1 - aseqnet.1

Table of Contents


aseqnet - ALSA sequencer connectors over network


aseqnet [remotehost]


aseqnet is an ALSA sequencer client which sends and receives event packets over network. Suppose two hosts connected by network, hostA as a server and hostB as a client. The ALSA sequencer system must be running on both hosts. For creating the server port, run the following on hostA:

  • :: hostA% aseqnet
    sequencer opened: 128:0

Then a user client 128 with port 0 was opened on hostA. (The client number may vary.) For creating the (network-)client port, run aseqnet with the hostname of the server:

  • :: hostB% aseqnet hostA
    sequencer opened: 132:0

Now all events sent to hostA:128:0 are transferred to hostB:132:0, and vice versa.

The ports created by aseqnet can be connected arbitrary to other sequencer ports via aconnect(1). For example, to connect hostB:132:0 to a MIDI output device 65:0:

  • :: hostB% aconnect 132:0 65:0

Then events to hostA:128:0 will be delivered to hostB:65:0. The following command plays MIDI on hostB.

  • :: hostA% pmidi -p 128:0 foo.mid

The multiple clients may exist simultaneously. If hostC is connected as a client to hostA, events from from hostA are sent to all connected network clients, i.e. hostB and hostC. However, only one connection is allowed from a client to a server.

To disconnect network, stop all clients before server by ctrl-C or sending signal to them. The server will automatically quit.


-p port
Specify the TCP port number or TCP service name.
-s addr
Subscribe to the given address for read automatically.
-d addr
Subscribe to the given address for write automatically.
-n name
Specify the midi name of the process.
Verbose mode.


aconnect(1), pmidi(1)


Takashi Iwai <>.

Author: dt

Created: 2022-02-22 Tue 16:00