Thanks for a great plugin. It was exactly what I needed. I was having a problem where the Default Artist I specified in the settings was not being displayed in the audio_artist meta tag on my post. The culprit seems to be on line 162 (version 0.4.5):
Currently (version 0.45):
$audio_artist = ($audio_artist <> "post_author")?$audio_author:$post_author;
$audio_artist = ($audio_artist <> "post_author")?$audio_artist:$post_author;
Could you update the plugin to fix the problem?