Audio.bgm_pos : "BGM ã®å†ç”Ÿä½ç½®ã‚’å–å¾—ã—ã¾ã™ã€‚ogg ã¾ãŸã¯ wav ã®å ´åˆã®ã¿æœ‰åйã§ã™ã€‚有効ã§ãªã„å ´åˆã¯ 0 ã‚’è¿”ã—ã¾ã™ã€‚" It return bgm_pos if you play a wav or an ogg.
With FmodEx Audio.bgm_position return the bgm_pos whatever the bgm file format.
You can also set the bgm_position with the command "Audio.bgm_position= value" (in millisecond), get and set the volume in playing (Audio.bgm_volume) and set the loop point (usefull for midis but sometimes it make an horrible sound).
This script give you a better Audio gestion than the Audio module included in RGSS 3. (But I've just converted this script, the Audio module don't use all the FModEx function.)