AP have released their "final" wagon pack - 'Old'. Additionally, existing owners of their BAA/BZA, JHA, JXA/POA and TDA-D wagon packs can re-download those to make use of the new sounds which are now included with those. https://www.armstrongpowerhouse.com/sounds/rolling_stock2/wagon_old_sound_pack
If you buy the TDA-D wagons, the sounds only apply to them, but if you buy the old wagon sounds, these are basically the same sounds applied to all old wagons?
I From the AP website: https://www.armstrongpowerhouse.com/index.php?route=common/home We are pleased to announce the release of our fourth and final wagon sound pack; Wagon (Old) Sound Pack.
Not sure if anyone else has the AP TDA D wagon pack, but there seems to be a red light on both sides of the final wagon. An error, I'm sure?