Use xmp to convert DMF files to WAV

xmpScript.applescript

set channelNumbers to 12
set fileName to "/Users/you/Projects/SONGNAME"
set nr to 1
set extension to ".WAV"
set dmfFileName to "'/Users/you/Projects/SONGNAME.DMF'"

repeat while nr ≤ channelNumbers
	-- display dialog nr
	
	set xmpcmd to "/usr/local/bin/xmp -S " & nr & " -o '" & fileName & nr & extension & "' " & dmfFileName
	-- display dialog xmpcmd
	do shell script xmpcmd
	
	set nr to nr + 1
end repeat

what program did you use