---
name: "sfizz_jack"
section: "1"
platform: "linux"
package: "sfizz-standalone"
version: "1.2.3-15"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/sfizz_jack"
---

# sfizz\_jack(1)

Launch a sfizz instance as a JACK client

## NAME

sfizz\_jack - Launch a sfizz instance as a JACK client

## SYNOPSIS

sfizz\_jack \[FILE\] \[OPTIONS...\]

## DESCRIPTION

sfizz\_jack wraps the sfizz SFZ library in a JACK client that can be controlled by a text interface.

## OPTIONS

- FILE

  An optional SFZ file name to load at firsts

- \--client\_name

  Name for the JACK client

- \--num\_voices NUMBER

  Change the maximum polyphony

- \--preload\_size NUMBER

  Bytes to preload in cache for samples

- \--state

  Output the state in the JACK loop

- \--jack\_autoconnect

  Autoconnect the JACK outputs

## TEXT INTERFACE

It is possible it interact with the JACK client through the standard input. The possible commands are

- load\_instrument FILE

  Load an instrument

- set\_preload\_size NUMBER

  Set the number of bytes to preload in cache for samples

- set\_voices NUMBER

  Change the maximum polyphony

- quit

  Quit

## SEE ALSO

[sfizz\_render(1)](/sfizz_render/1.md)

## BUGS

See the main repository at https://github.com/sfztools/sfizz.

## AUTHOR

Contributors can be seen on the main repository at https://github.com/sfztools/sfizz.