Plug the microphone cable into the USB port on the computer. Ideally, the microphone should be mounted on a stand rather than held in the hands, to avoid unwanted noise associated with movement of the microphone while recording.
Using the computer selected for recording, open and run the chosen digital audio workstation (DAW) software.
Set the "Recording" parameter to USB input. Navigate to the audio settings of the DAW software. The location will differ from package to package; on a Mac, it may be in the main Preferences section, while on a PC it may be in the Tools menu selection tree. (Both "Playback" and "Record" settings are likely to be set to the default sound card on your specific machine.)
Set up at least two tracks to record. Consult the help file for your specific DAW package for additional details.
Put on the headphones and enable the "Record" function for one of the tracks; typically there will be a red flashing "R" on the track itself, to indicate a track is armed. Sing into the microphone and check the input levels. Lower or raise the input level until its maximum peak is at the yellow line, just short of the red, when singing at the loudest volume.
Press the "Record" button (located next to the play button) and sing to record the first track. Repeat the procedure for the second track, this time disarming the record function for the first track and enabling it for the second one. Add a harmony to the line previously recorded. Continue for as many tracks as needed.
Set the volume of each recorded track. Set additional parameters, such as the stereo pan values or any effects (such as equalization or reverb) on a track-by-track basis.
Export the final mixed audio track from the DAW software package. This can be accomplished through myriad processes. Most often however, there is a simple export function that allows the user to create a specific audio file format (MP3, WAV, AIFF) from the mixed tracks. The export function will also contain choices regarding normalization, stereo settings, and file formats. Read these parameters to achieve the most appropriate exported file quality.
Listen to the exported file to ensure it sounds as it should. If not satisfied, repeat the mixing process and make adjustments. Export and review the file again.