IBM PC 300PL Type 6584, User Manual

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Using audio features
Your computer has an integrated audio controller that supports most Sound
Blaster applications and is compatible with the Microsoft Windows Sound
System. Your computer also has a single internal speaker and three audio
connectors. Using the audio controller, you can record and play back
sound and music and enjoy sound with multimedia applications.
Optionally, you can connect two stereo speakers to the line-out connector to
enjoy better sound with multimedia applications.
The audio connectors in your computer are 3.5 mm (1/8-in.) mini-jacks. A
description of the connectors follows. (For the location of the connectors,
see “Connecting computer cables” on page 10.)
Line out: This jack is used to send audio signals from the computer to
external devices, such as stereo-powered speakers with built-in
amplifiers, headphones, multimedia keyboards, or the audio
line-in jack on a stereo system.
Note: The internal speaker in your computer is disabled when
an external speaker is connected to the headphone
connector on your computer.
Audio line in: This jack is used to accept audio signals from external
devices (such as line output from a stereo, television, or musical
instrument) into the computer sound system.
Microphone in: This jack is used to connect a microphone to your computer
when you want to record voice or other sounds on the hard
disk. This jack can also be used by speech recognition
software.
Note:
If you experience interference or speaker feedback while
recording, try reducing the microphone recording
volume (gain).
Procedures for recording and playing back sound vary by operating system.
See your operating system documentation for information and instructions.
Updating system programs
System programs are the basic layer of software built into your computer.
They include the power-on self-test (POST), the basic input/output system
(BIOS) code, and the Configuration/Setup Utility program. POST is a set of
tests and procedures that is performed each time you turn on your
computer. BIOS is a layer of software that translates instructions from other
layers of software into electrical signals that the computer hardware can
Chapter 3. Operating and caring for your computer
27