Dialogue recording was done at my house, I set up this old Philips mic which has a very un-sensitive diaphragm and also a narrow, filtered frequency response. This all results in a very dry, radio/telephone style sound which required only a touch of compression to make it sound right. No additional filtering or tone alteration occured, just the straight mic signal. A touch of compression and that was the sound that ended up in the game.
The voice actress was a good friend of mine named Emily, and though she doesn’t really sound old enough to be a mother I don’t think think that it’s unreasonable to suspend reality for that one detail. Being a student, many of the people I encounter that could be voice actors for me are also of student age. This is a limitation that didn’t occur to me at first, but in future I’ll know to try and get a more age-appropriate actor for the dialogue. Voice tone character is more important that I realised initially.