---
name: "jack_metro"
section: "1"
platform: "linux"
package: "jack-example-tools"
version: "4-2"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/jack_metro"
---

# jack\_metro(1)

JACK toolkit metronome

## NAME

jack\_metro - JACK toolkit metronome

## SYNOPSIS

**jack\_metro** \[ *-n* name \] \[ *-f* hz \] \[ *-D* msecs \] \[*-a* % \] \[ *-d* % \] *-b* bpm

## DESCRIPTION

**jack\_metro** is a simple metronome for JACK. It generates a synthetic "tick" sound for every beat. Note that is does **not** connect its output port by default - to hear the sound it makes you must connect them using some other tool.

## OPTIONS

- **-n**, **--name**

  Specify a name for this instance of the metronome.

- **-f**, **--frequency** Hz

  Define the frequency of the "tick" in Hz.

- **-D**, **--duration** msecs

  Define the duration of the "tick" in milliseconds.

- **-a**, **--attack** %-age

  Define the duration of the attack phase of the "tick" as a percentage of the duration.

- **-d**, **--decay** %-age

  Define the duration of the decay phase of the "tick" as a percentage of the duration.

- **--b**, **--bpm** bpm

  Define the number of beats per minute.

## AUTHOR

Anthony Van Groningen