If you are experiencing issues with MP3 audio not playing in Spine version 4.2, but it works in version 4.1, it could be due to a bug or a configuration issue in the newer version. First, ensure that the audio file is correctly formatted and compatible with Spine's requirements. Spine supports WAV, MP3, and OGG formats, with specific requirements for WAV files. You can check the spine.log file for any error messages related to audio loading. Additionally, make sure that the audio device settings in the Spine editor are correctly configured. If the issue persists, consider reinstalling the latest version of Spine 4.2, as updates may have addressed this problem.

kimifan If the audio file itself appears in the editor but no sound is heard, the audio playback device may not be properly recognized, so check the spine.log file as recommended by Spinebot. You can also check which audio devices are enabled in the audio view: https://esotericsoftware.com/spine-audio-view

If the audio file itself cannot be found in the editor, check the path set in the Audio node:
https://esotericsoftware.com/spine-events#Audio-node