My USB adapter arrived today! Yippee! 
I opened it up to play around with it a bit, just to make sure that my computer and GarageBand would recognize it…
The computer instantly saw it and I was able to adjust the input in the System Preferences–>Sound menu.
Now, interestingly enough, GarageBand did not readily perceive the extra input source….
So, I went into Preferences….
…Clicked onto the Audio/MIDI section….
…Where I could click the “Audio Input” drop-down button to find “C-Media USB Audio Device”…
And, voilà, GarageBand was now receiving the info coming in from the adapter, once I selected it in Input Source drop-down menu of the track.
And, so far, just plugging Aisling directly into the port (via a wonderfully handy 1/8th to 1/4 inch male-to-male cable adapter I have), the sound is crystal clear!
Next up, sometime this week, I’ll begin attaching everything together with my awesome beautiful Behringer mixer and start recording the nice demos for Gypsy Wanderer…! 
