Loop Audio File in Godot - SMABVERSE/GODOT-CHAT-GPT GitHub Wiki

The following article is copied from ChatGPT-4o's response to the following prompt:

Hello, how can you loop an audio file except for its intro in Godot?

To loop an audio file except for its intro in Godot, you can use the AudioStreamPlayer node along with some scripting to manage the playback. The idea is to play the intro part once and then loop the rest of the audio continuously. Here’s a step-by-step guide to achieve this:

  1. Import your audio file: Make sure your audio file is imported into the Godot project.

  2. Create an AudioStreamPlayer node: Add an AudioStreamPlayer node to your scene.

  3. Split the audio file: You need two separate audio files: one for the intro and one for the looping part. If your audio file is not already split, you can use an audio editor to create these two parts.

  4. Set up the AudioStreamPlayer: Use the AudioStreamPlayer to play the intro and loop parts accordingly.

  5. Scripting: Use a script to manage the playback logic.

Here’s a step-by-step implementation in GDScript:

Step 1: Import your audio files

Ensure your intro and looping part of the audio files are imported into the res:// directory of your Godot project.

Step 2: Create an AudioStreamPlayer node

Add an AudioStreamPlayer node to your scene. You can do this by right-clicking on the scene tree, selecting "Add Child Node," and then choosing AudioStreamPlayer.

Step 3: Assign your audio files to variables

Create a new script attached to the node where your AudioStreamPlayer is located, and assign the audio files to variables.

Step 4: Script for playing intro and looping part

Here’s a script that plays the intro once and then loops the rest:

extends Node

# Declare variables for the audio streams
var intro_stream: AudioStream
var loop_stream: AudioStream

# Get the AudioStreamPlayer node
onready var audio_player: AudioStreamPlayer = $AudioStreamPlayer

# Function to initialize the audio streams
func _ready():
    # Load the audio files (adjust paths to your files)
    intro_stream = load("res://path_to_your_intro.ogg")
    loop_stream = load("res://path_to_your_loop.ogg")
    
    # Connect the finished signal to a custom function
    audio_player.connect("finished", self, "_on_intro_finished")
    
    # Start playing the intro
    audio_player.stream = intro_stream
    audio_player.play()

# Function to handle the end of the intro
func _on_intro_finished():
    # Set the audio player to the loop stream and enable looping
    audio_player.stream = loop_stream
    audio_player.loop = true
    audio_player.play()

Explanation:

  1. Variables: intro_stream and loop_stream hold the audio streams for the intro and the looping part, respectively.
  2. AudioStreamPlayer: The audio_player variable is the AudioStreamPlayer node.
  3. _ready(): Loads the audio files and starts playing the intro part. It also connects the finished signal of the AudioStreamPlayer to a custom function _on_intro_finished.
  4. _on_intro_finished(): This function is called when the intro finishes playing. It switches the audio player to the looping part of the audio and enables looping.

Step 5: Running the Scene

Run the scene to test the setup. The audio player should play the intro once and then loop the rest of the audio indefinitely.

By following these steps, you can effectively loop an audio file in Godot while skipping the intro after it has played once.