---
name: "al_set_sample_instance_speed"
section: "3"
platform: "linux"
package: "allegro"
version: "5.2.11.3-2"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/al_set_sample_instance_speed"
---

# al\_set\_sample\_instance\_speed(3)

Allegro 5 API

## NAME

al\_set\_sample\_instance\_speed - Allegro 5 API

## SYNOPSIS

-

  ```
  #include <allegro5/allegro_audio.h>
  bool al_set_sample_instance_speed(ALLEGRO_SAMPLE_INSTANCE *spl, float val)
  ```

## DESCRIPTION

Set the relative playback speed of the sample instance. 1.0 means normal speed.

Return true on success, false on failure. Will fail if the sample instance is attached directly to a voice.

## SEE ALSO

[al\_get\_sample\_instance\_speed(3)](/al_get_sample_instance_speed/3.md)