The Internal Audio System is designed for maximum application flexibility
with peripheral audio devices such as sound boards, CD-ROMs, CD digital
audio players, headphones, and microphones.
You select the operating mode by setting the front-panel Selection Switches
(A and B). There are four primary settings:
Switch A (In) —
AMPLIFIED
Switch A (Out) —
DIRECT
Switch B (In) —
SOUND BOARD
Switch B (Out) —
PC SPEAKER
By setting these switches in a variety of combinations, you can implement a
number of input/output configurations. Table 5.1 shows the possible settings
and the Internal Audio System’s functions in that configuration.
12
INTERNAL AUDIO SYSTEM
5. Operating Modes
Use
Action
Switch
A
Switch
B
Microphone/
CD Input
Receive audio from the
sound board.
Easy front-panel access to
an external sound source.
Applications requiring better
audio output than that
provided by your PC’s
internal speaker.
Voice annotation using
third-party sound boards.
Allows non-amplified sound
to be received at the back
panel, if Metal Bracket is
installed.
Source audio is received
from the front CD/Micro-
phone input and amplified
through the speakers.
Audio is received from the
PC motherboard and
amplified through the front
speakers.
External audio passes to
the sound board via the
back panel and is amplified
through the front speakers.
NONE
NONE
Microphone,
CD, or other
sound source
Microphone,
CD, or other
sound source
Table 5.1. A and B Selection Switch Settings and Operating Modes.
