$set(_instrumentsFieldName,instruments)
    $if($eq_any($upper(%_extension%),MP3),$set(_instrumentsFieldName,$upper(%_instrumentsFieldName%)))

$foreach(%_instruments%,
  $set(_currentInstrument,%_loop_value%)

  $if($eq(%_skipInstrument%,1),,
    $set(_standardizedInstrument,$lower(%_currentInstrument%))

    $set(_standardizedInstrument,$replace(%_standardizedInstrument%,vocals,vocal))

        $set(_currentCustomPerformerField,performer %_standardizedInstrument%)
            $if($eq($upper(%_extension%),MP3),$set(_currentCustomPerformerField,$upper(%_currentCustomPerformerField%)))
    $set(_temp_currentCustomPerformerField,temp performer %_standardizedInstrument%)

    $if($eq(%_skipInstrument%,1),,
            $foreach(; additional ; guest ; solo ; guest solo ,
        $set(_currentInstrumentRegex,^\(.*\, \)?\(.* and \)?%_loop_value%$replace($replace(%_currentInstrument%,\(,\\\(),\),\\\))\(\, .*\)?\( and .*\)?\$)
        $setmulti(_currentInstrumentMains,$rperformer(%_currentInstrumentRegex%,	),	)
        $foreach($unique(%_currentInstrumentMains%),
          $set(_performer,%_loop_value%)

          
                    $set(_performer,$replace($get(_performer),‐,-))
          $set(_performer,$replace($get(_performer),“,"))
          $set(_performer,$replace($get(_performer),”,"))
          $set(_performer,$replace($get(_performer),’,'))
  
                    $if($or($find(%_performer%,\(CV:),$find(%_performer%,\(CV.)),
            $set(_performer,$rreplace(%_performer%,\(.*\)\\\(CV[.:]\(.*\)\\\),\\2))
          )
                    $if($or($find(%_performer%,\(cv:),$find(%_performer%,\(cv.)),
            $set(_performer,$rreplace(%_performer%,\(.*\)\\\(cv[.:]\(.*\)\\\),\\2))
          )
          $copymerge(%_temp_currentCustomPerformerField%,_performer)
        )      )
            $set(_temp_ordered_currentCustomPerformerField,)
      $foreach($unique($get(%_currentCustomPerformerField%)),
        $set(_oldPerformerValue,%_loop_value%)
        $set(_foundOldPerformerValue,0)
        $foreach($unique($get(%_temp_currentCustomPerformerField%)),
          $if($eq(%_loop_value%,%_oldPerformerValue%),$set(_foundOldPerformerValue,1),)
        )
        $if($eq(%_foundOldPerformerValue%,1),$copymerge(_temp_ordered_currentCustomPerformerField,_oldPerformerValue),$set(NOT FOUND,NOT FOUND))
      )
      $if(%_currentCustomPerformerField%,$delete(%_currentCustomPerformerField%))
            $copymerge(%_currentCustomPerformerField%,_temp_ordered_currentCustomPerformerField)
            $copymerge(%_currentCustomPerformerField%,%_temp_currentCustomPerformerField%)

      $if(%_temp_currentCustomPerformerField%,$delete(%_temp_currentCustomPerformerField%))
      $if(%_temp_ordered_currentCustomPerformerField%,$delete(%_temp_ordered_currentCustomPerformerField%))

            $copymerge(_standardizedInstruments,_standardizedInstrument)
    )
  )

  $set(_skipInstrument,)
)
$foreach($unique(%instruments%),
  $set(_currentCustomPerformerField,performer %_loop_value%)
  $if($find(%_standardizedInstruments%,%_loop_value%),,$delete(%_currentCustomPerformerField%))
)

$delete(%_instrumentsFieldName%)
$foreach($unique(%_standardizedInstruments%),
  $set(_standardizedInstrument,%_loop_value%)
  $copymerge(%_instrumentsFieldName%,_standardizedInstrument)

    $if($eq($upper(%_extension%),M4A),
        $set(_currentCustomPerformerField,performer %_standardizedInstrument%)
    $set(%_currentCustomPerformerField%,$join($get(%_currentCustomPerformerField%),; ))
  )
)
$if($eq($upper(%_extension%),M4A),
  $set(instruments,$join(%instruments%,; ))
)

$unset(performer:*)