A:
You can change the recording settings depending on the type of use.
1. Meeting - To record in a variety of situations, such as recording in a conference room.
2. Voice Notes - To record dictation with a microphone in front of your mouth.
3. Interview - To record human voice at a distance of 1 to 2 meters (40 to 80 in.).
4. Audio IN - To record from external equipment, such as a portable CD/MD player or a tape recorder, connected to the IC recorder via an audio output connector (stereo mini-jack). Also used for dubbing.
You may also refer to page 32-33 of the operating manual using the link below.
http://www.docs.sony.com/release/ICDAX412_EN.pdf