Toshiba PSM30C-7101U User Manual - Page 80

User's Manual Feedback Your computer's built-in microphone can be used to record monaural sounds into your applications and to issue voice commands to applications that support such functions. Since your computer also has built-in speakers, "feedback" may be heard under certain conditions. Feedback occurs when sound from the speaker is picked up in the microphone and amplified back to the speaker, which amplifies it again to the microphone. This feedback occurs repeatedly and causes a loud, high-pitched noise. It is a common phenomenon that occurs in any sound system when the microphone input is output to the speaker (throughput) and the speaker volume is too loud or too close to the microphone. You can control throughput by adjusting the volume as described in the Volume control item in this section. Writing CDs on CD-RW/DVD-ROM drive Depending on the type of drive installed, you may be able to write CDs. The CDRW/DVD-ROM drive lets you write as well as read CD-ROMs. Observe the precautions in this section to ensure the best performance for writing CDs. For information on loading and unloading CDs refer to the Using optical media drives section. NOTE: CD-R discs can be written to only once. CD-RW discs can be rewritten many times. Before writing or rewriting Please observe the following points when you write or rewrite the data. y We recommend the following manufacturers of CD-R and CD-RW media. Media quality can affect write or rewrite success rates. CD-R: TAIYOYUDEN CO., LTD. MITUBISHI CHEMICAL CORPORATION RICOH Co., Ltd. Hitachi Maxell Ltd. CD-RW: MITUBISHI CHEMICAL CORPORATION RICOH Co., Ltd. 4-12 OPERATING BASICS