Toshiba M200 User Manual

 4-21

Your computer has a built-in microphones that can be used to record stereo sounds
into your applications. It can also be used to issue voice commands to applications
that support such functions.

Since your computer has a built-in microphones and speaker, "howling" may be
heard under certain conditions. Howling occurs when sound from the speaker is
picked up in the microphones and amplified back to the speaker, which amplifies it
again to the microphones.

This howling occurs repeatedly and causes a very loud, high-pitched noise. It is a
common phenomenon that occurs in any sound system when the microphones
input is output to the speaker (throughput) and the speaker volume is too loud or
too close to the microphones. You can control throughput by adjusting the volume
of your speaker or through the Mute function.

To adjust the volume or activate Mute, click 

, point to 

, point to

, point to 

and click 

. In the

 panel, you can use the slide bars to adjust the volume level or

click 

at the bottom of the panel.

This section describes audio controls including sound levels and power
management.

The Volume Control utility lets you control the audio volume in Windows for both
playback and recording.

❑

To launch Volume Control for playback, click 

Start,

 point to 

All Programs,

point to 

Accessories,

 point to 

and click 

.

❑

To launch Recording Control, click 

, point to 

Properties,

 choose

 and click 

.

❑

To view details of the Volume Control, click 

 on the Volume Control.

The change the microphone gain, follow the steps below.

1.

Click

 Start

, point to 

, point to 

, point to 

 and click

 Volume Control

.