Edit .WAV file loop metadata in Unity.
Unity has limited support for looping metadata in .WAV files. It allows specifying a loop start and end point which will be used when inside the loop (Audio will still be played back from the start).
A very common use case is music with an intro that should be skipped after a loop, which requires precise timing.
Most other tools that support this functionality are either not widely available, unmaintained or complicated to use, so this tool was created to allow editing loops with a simple interface directly in Unity.
No custom scripts are needed with this method. All pre-processing is done in the editor to create audio files that can be imported by Unity. The files can be played back with any standard AudioSource.
Compared to using scripts to set the playback position to the start of the loop when the AudioClip's current time is past the loop's end, this method is framerate-independent, so there won't be any stutters.
Open the Package Manager in Window - Package Manager. Click the "+" button and choose
Add package from git URL.... Enter https://github.com/SkaillZ/tidalwav.git and click
Add.
Copy the files in the Editor folder into a subdirectory of the Editor folder
in your project.
Open the WAV Loop Editor window in Window - Audio - WAV Loop Editor. Next, select an AudioClip and click Load. Depending on the file size, loading might take a while.
Click Add Custom Loop to add a loop to the file. You can select if you want to display the start and end time in samples or minutes and seconds. In the start and stop fields, you can enter the start and stop time of the loop in the selected unit. Click Save to apply your changes to the file.
A preview window is displayed on the bottom. Click the "-" and "+" buttons to zoom in and out and click the play button on the right to play back your loop. You can also use the Start and End buttons to set the loop's start or end point to the current playback position.
Please note that audio will still be played back from start to finish if looping is disabled on the AudioSource. Only .WAV files are supported.
Loading loops from other tools is supported. Since Unity only uses the first loop in the WAV metadata, you can delete the other loops in a list to choose the one you want to use if more than one loop is present.
- Loops in WAV files that were added in other programs might not show up correctly.
- Finding a perfect start and end position is a little finicky due to the limitations of Unity's AudioClip preview feature, so it's currently easier to find the exact start and end position in an audio editing program like Audacity and enter them in the tool manually.
MIT