Audio Evolution has a few ARexx commands.

The port name is "AE_AREXX" (case sensitive)

Recognised commands are:

play

stop

loadsample - this requires the filename argument, so the full command is something like "loadsample filename work:sound/samples/trumpet3.aiff".

An example ARexx file, which loads a sample, plays and then stops after 5 seconds, will be found in the Rexx drawer.