ALS format is used for project files from Ableton Live digital audio workstation and it is this solution you have to use if you want to export the audio content to one of the supported format, in the case of als to wave conversion as standard PCM audio files.
As far as we know, only the original software can open .als files, so if you struggle with this export, it might be best to reach out to their support or online community for help.
Updated: October 9, 2023