When converting a bunch of files there needs to be a checkbox that we can select that indicates that the selection contains files from multiple discs. Without this option the [IFMULTI] option in the dynamic file naming is useless. The option is present for CD ripping but not for batch converting. Bonus points if you allow us, on a per-folder basis in the batch converter to check a box that indicates that this is a multi-disc album. I always "convert" stuff I downloaded from Amazon so that files are all consistently named. Thank you for considering this feature request.