You should now see the window below. Channels Mono sounds have one channel of audio. Stereo sounds have two channels. Stereo sounds use twice as much storage as mono sounds and can take twice as long to process. This value affects the quality and quantity of the sound.
Higher values allow a wider range of frequencies to be recorded and give better quality.
Smaller values require less space. 8000 Telephone quality. 11025 Low end radio quality. Good for voice. 22050 Radio quality.