I am running a 15" MacBook pro (2015) and using a Behringer U-Controller (UCA202) while running OS 10.14.6 and am using Audacity 3.1.3
Because Apple stopped making USB ports available on the MacBook, i have an Elgato Thunderbolt 3 dock in order to use USB devices.
So, the Behringer is getting its audio from my Soundcraft desk and that is via rca leads going into the “in” on the U-Controller. The output of the Controller goes back into the desk. The USB output from the controller then plugs into the usb input of the Legato. I am able to get sound out from Audacity via this set up perfectly, but no signal is registering when in record mode. I have checked the audio-midi settings and they show "USB Audio CODEC inputs (2 of) - as well as 2 out.
Audacity settings are set for USB Audio CODEC - 2 channel. However, i do notice that in the audio-midi settings for the Audio CODEC in, that both the master and channel volumes are on ZERO and the controls are greyed out. I suspect this is the issue but try as i may i am unable to do anything about it it. When i unplug the Controller, these settings disappear in the audio-midi set up, and reappear when plugged in. I know the controller is not faulty as i have two, and it is the same with both of them.
Any help would be greatly appreciated.