opcode Mix21B, 0, kkii   ; MULTIMODE support a/k?
  a1 zar 1 ; CHANGE 
  a2 zar 1 ; CHANGE 
  a3 zar 1 ; CHANGE 
  kLev1, kLev2, iSW1, iSW2 xin ; iSW = -1/1
  aout = a1 + a2*kLev1*iSW1 + a3*kLev2*iSW2
  zaw aout, 2 ; CHANGE 
  ; LIN vs DB?
endop
