Hi AmigaSystem!
Thanks for the suggestions!
I already cover some of them (Ami-PlayMOD, Prayer2, TKPlayer, and TMLG) and AmiModRadio includes MultiPlayer already, it's my first player! But it's doesn't support many formats, crashes in some situations, and doesn't provide a STATUS ARexx command.
I didn't know the other ones (APlayer, EMPY, Plady, and TFMX), I'll try them out!
Cheers!