.SLP File Extension

SpectraLayers Pro Project

Developer MAGIX
4.0  |  6 Votes

What is an SLP file?

An SLP file contains a project created by Steinberg SpectraLayers Pro, an advanced audio spectrum editor; supports multiple audio layers with each layer containing independent edits and filters; enables unmixing of standard audio files, sound isolation, and custom sound shaping; used by sound engineers and audio-video editors.

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SLP files save references to the source media files, layers, edits, and applied filters. SpectraLayers Pro was developed by Sony until it was sold to MAGIX in 2016, and then was acquired by Steinberg in 2019.

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Programs that open SLP files

Project Slippi Replay

Developer Fizzi and Project Slippi Team
4.0  |  2 Votes

An SLP file may also be a Super Smash Bros. Melee match replay created by Project Slippi. It contains a replay and statistics about the match shown in the replay. You can play SLP files in the Slippi Launcher desktop app.

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Project Slippi is a fan-made extension to Super Smash Bros. Melee that adds several features. One of the features Project Slippi adds is the ability to automatically save match replays as SLP files.

With this feature enabled, after a match played using Project Slippi concludes, the program automatically saves a replay of that match and the match's statistics in an SLP file. Players can watch the replay by transferring it to their PC and opening it in Slippi Launcher, which is available for Windows, macOS, and Linux.

How to open an SLP file

You can open an SLP file in Slippi Launcher (multiplatform) to play the replay it contains. The easiest way to open an SLP file is to place it in the ~/​Users/​YourUserName/​Slippi directory, select Slippi Launcher's Replays tab, and then open your SLP file.

Programs that open SLP files

Sisulizer Project File

Developer Sisulizer
3.5  |  2 Votes

Project created with with Sisulizer, a visual software localization tool; saved in an XML format and contains the localization project data; stores all project translations and modifications.

Programs that open SLP files


Stormworks Mod File

Developer N/A
2.0  |  2 Votes

An SLP file may also be a mod file used with Stormworks, an air sea rescue simulation game. It contains data used to modify Stormworks's default gameplay. SLP files are installed using StormLoader, an open-source mod manager for Stormworks.

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Screenshot of a .slp file in StormLoader
SLP file open in StormLoader

Stormworks players use SLP files to add additional vehicles, parts, structures, cosmetic enhancements, and gameplay options to Stormworks. To do so, they download SLP files from Discord, GitHub, or another download source, import the files into StormLoader, and then launch Stormworks from within StormLoader. StormLoader then applies the player's selected mods to their copy of Stormworks.

Using StormLoader, players can also create separate profiles that include different collections of SLP files. This can be useful if a player wants to switch between several uniquely customized variations of Stormworks.

How to open an SLP file

To import an SLP file into StormLoader, select the Add button located in the program's upper left-hand corner. You can import any number of SLP files before launching a modded game of Stormworks (by selecting StormLoader's Launch button).

Programs that open or reference SLP files


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