---
name: "aseqdump"
section: "1"
platform: "linux"
package: "alsa-utils"
version: "1.2.16-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/aseqdump"
---

# aseqdump(1)

show the events received at an ALSA sequencer port

## NAME

aseqdump - show the events received at an ALSA sequencer port

## SYNOPSIS

**aseqdump** \[*-p client:port,...*\]

## DESCRIPTION

**aseqdump** is a command-line utility that prints the sequencer events it receives as text.

To stop receiving, press Ctrl+C.

## OPTIONS

- *-h,--help*

  Prints a list of options.

- *-V,--version*

  Prints the current version.

- *-l,--list*

  Prints a list of possible input ports.

- *-u,--ump=version*

  Sets the client MIDI version. 0 is for legacy mode, 1 is UMP MIDI 1.0 mode, and 2 is UMP MIDI 2.0 mode.

- *-r,--raw*

  Suppress the automatic conversion of events among UMP and legacy clients.

- *-R,--raw-view*

  Shows the raw values as is. The channel numbers and UMP group numbers are 0-based in this mode. This is the default behavior.

- *-N,--normalized-view*

  Shows the normalized values to be aligned with MIDI 1.0. The channel numbers and UMP group numbers are shown as 1-based values, i.e. 1 is the lowest number. The velocity and data values are normalized between 0 and 127. The values for MIDI 2.0 are shown with two digits decimal points (from 0.00 to 127.00). The pitch wheel is normalized between -8192 to 8192, too.

- *-P,--percent-view*

  Shows the values in percentage. The channel numbers and UMP group numbers are shown as 1-based values in this mode, too. The velocity and data values are normalized between 0 and 100%, shown with two digits decimal points. The pitch wheel is normalized between -100% to 100%, too.

- *-p,--port=client:port,...*

  Sets the sequencer port(s) from which events are received.

  A client can be specified by its number, its name, or a prefix of its name.  A port is specified by its number; for port 0 of a client, the ":0" part of the port specification can be omitted.

## AUTHOR

Clemens Ladisch \<clemens@ladisch.de\>