Audacity does not recognise Blue Yeti mic as recording device

[rtalk]

OK, I guess my Audacity is working correctly after all. I read here:
https://wiki.audacityteam.org/wiki/Linux_Issues

QUOTE
ALSA: Audacity's ALSA support is the default and considered stable. The correct device to use on out-of-the-box ALSA setups is "Default". This provides software mixing and resampling of multiple streams as found on other operating systems, and is a good alternative to a sound server. This is almost always the right sound device to use, and you can ignore the others. "Default" is the same as "pulse" on systems where PulseAudio is default sound system.

PulseAudio: Audacity's PulseAudio support generally works well. PulseAudio doesn't support ALSA's mixer interface so Audacity's Mixer Toolbar input slider is disabled under PulseAudio. Audacity can freeze using PulseAudio if playback or recording are started or stopped very rapidly or frequently. Playback can also occasionally be distorted or excessively fast.
ENDQUOTE

So, that is exactly how my system behaves under ALSA and now I see why I only see default as the choice for record and playback. At least the recording and playback works so I guess I will just leave it alone for now.

[steve]

I've finally got Ubuntu 19.10 running, and I see a full set of inputs and outputs as expected, so it's a mystery why you are only seeing "default". Nevertheless, as it's working for you, probably best to leave it alone.

[rtalk]

I uninstalled Audacity 2.3.3 from my Ubuntu 19.10 desktop and then installed Audacity 2.3.2-2 from the ubuntu-eoan-universe source. Now I can see all of my inputs including the Yeti for record and playback!

Audacity works great now!

[steve]

I uninstalled Audacity 2.3.3 from my Ubuntu 19.10 desktop and then installed Audacity 2.3.2-2 from the ubuntu-eoan-universe source

I'd recommend that you report that to Ubuntu.