TIL files on Sound input and on AppleVision software

Recent TIL files of note:

#22146: This TIL addresses problems with recording audio via the PlainTalk microphone in G3 Macs or any Mac running Mac OS 8.1. The symptom is that no audio is recorded. "This issue can occur if the application you are using to record audio is monitoring another sound source. If the application does not let you change the sound source your Apple PlainTalk Microphone, you can use the SoundSource control strip."

#30387: This TIL addresses confusion regarding different versions of AppleVision Display and AppleVision Software - and which is the correct version to use.