I have an ALD of a show (a festival) and I am pretty sure you can hear the band talking a bit between songs. Is that some sort of IEM mix they use for that possibly?
ALD stands for Assisted Listening Device; it's a completely different thing than the IEMs, which stand for In Ear Monitor and are the earphone feeds that substitute the big speakers that musician use(d) to have onstage. IEMs feature a different mix for each band member (for example, the singer will usually have few bass and a lot of guitar and drums; the bassist will mostly have drums; etc), sometimes a metronome and often a crew member speaking to them - something that the crowd doesn't hear, obviously. On the other hand, ALDs are also earphone feeds, but they're supplied to handicapped members of the audience, and they play the exact same feed than the rest of the audience is hearing by the PA - just in a portable, reduced size device. ALDs are not always available/provided. If the recording you mention has the band talking, it's probably an IEM recording, even if the taper marked it as ALD.