Argument in Argument 2 functions

Hey Im trying to put an Argument in another Argument. I mean that i have to functions and they take arguments.

  1. function

    fun playTone(tone: Int)
    mp = MediaPlayer.create(this, tone)

  2. function

fun InstToMusic (Inst: Int)
playTone(tone = R.raw.$Instc2 )

The first argument is working.
But this 2. function is of course not working. But does anyone know how to fix it?