Right-click the Volume icon in the taskbar's notification area and choose Sounds (refer to Figure 4.32).
SW Synth controls the volume of music produced by the sound card's MIDI synthesizer or wavetable.Speakers/Headphones controls the volume of your PC's headphones or external or built-in speakers (connected to a USB port, motherboard audio port, or a sound card).Microphone controls the sound card's microphone input volume (usually used with a microphone or dictation headset).Line In/Aux controls the volume of the sound card's Line-In or Aux input (usually used to record from a stereo or other external playback device).CD Player controls the volume of audio CDs (if your CD drive is connected to the sound card directly with a cable).Depending on your computer's audio hardware, you may see all or some of these devices (or others not listed here) in the Playback and Recording tabs:
