function main(audioMaster: TAudioMasterCallbackFunc): PAEffect; cdecl; export;
begin
  // get vst version
  if audioMaster(nil, audioMasterVersion, 0, 0, nil, 0) = 0 then
  begin
    Result := nil;
    Exit;         // Old version
  end;

  effect := AExampleEffect.Create(audioMaster, 0, 0);
  if not Assigned(effect) then
  begin
    Result := nil;
    Exit;
  end;

  if oome then
  begin
    Effect.Free;
    Result := nil;
    Exit;
  end;

  Result := effect.getAeffect;
end;