This is a great tool for us DM500S where we usually don't have the Audio selection button...
Check this post on how to add the config line for Prefer Audio:
http://sat-industry.net/forums/showthread.php?t=16328
Works great! Tested in Gemini 1.01! Probably also PLi as they were the script owners... and the latest SF image, as it requires one of the lastest enigma versions.
Great news for the DM500! ;-) Better solution than Bullz_text plugin with newer images...