And a quick follow-up after spending a bit of time with this plugin. While looking at
I looked around here but was not able to immediately find posts containing voice recordings (turns out it’s buried in this topic). Some icon (maybe microphone?) indicating topics containing voice recordings might be a good idea, as well as the ability to filter by posts containing voice recordings in the search. Even searching mp3 did not take me straight to posts containing recordings. E.g. a filter to only return topics/posts that “include mp3 recordings”:
Also, just for giggles I recorded a 20 minute recording, then tried to upload it - but the upload failed because it was larger than the maximum size allowed. The recording was then lost, which in this case was no big deal… it was only a recording of me taking a nap, after all. 
But if I had actually spent 20 minutes recording myself saying something important I would have been pretty sad to lose it! So ideally the plugin would stop the recording before the limit is reached, or at least provide a fallback method to save the recording to my device so I can upload it elsewhere and share the link as suggested by the error message.
Update: not sure this is a surprise but this plugin does not work on mobile, using chrome on ios. The record button just doesnt do anything.
Another update: occurs to me the record button could live in the composer options submenu. That would be better in my opinion.