Audacity

To record others only (in better quality):

  Windows WASAPI -- Speakers (Realtek(R) Audio) (loopback)

To record self and others (in lower quality – typing is clearly audible):

  Windows DirectSound -- Primary Sound Capture Driver

General settings:

• 1 (Mono) Recording Channel
• Export as mp3; Variable bitrate; 65-105kbps; force export to mono