Export Audio Settings
Sample Rate

This determines how much high frequency content the file can contain. 44100Hz allows for frequencies up to 22kHz, 48000 Hz for frequencies up to 24 kHz and so on. The higher the value the better the sound quality.

44100Hz (44.1kHz) is the standard, but 48000 Hz (48 kHz) is also common. Selecting higher sample rates creates larger files and may also make your files incompatible with other applications.

Bit Depth

This determines the resolution of the file, 16 or 24 bits. The higher this value the less background noise there will be in the file (though 16 bit files have extremely low background noise to start with). 16 bits is the standard. Selecting higher bit depths creates larger files and may also make your files incompatible with other applications.

The exported file will always be a stereo audio file.

Which format to select depends on how you are planning to use the file. If you are planning to burn an audio CD, you should select 16 bit, 44100 Hz.