Operating Modes - Black Box AC470A Manual

INTERNAL AUDIO SYSTEM
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 B (In) — SOUND BOARD
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.
Table 5.1. A and B Selection Switch Settings and Operating Modes.
Switch
Switch Microphone/
B
A
Microphone,
CD, or other
sound source
Microphone,
CD, or other
sound source
12

5. Operating Modes

CD Input
Allows non-amplified sound
to be received at the back
NONE
panel, if Metal Bracket is
External audio passes to
the sound board via the
back panel and is amplified
through the front speakers.
Audio is received from the
PC motherboard and
NONE
amplified through the front
Source audio is received
from the front CD/Micro-
phone input and amplified
through the speakers.
Switch A (Out) — DIRECT
Switch B (Out) — PC SPEAKER
Action
installed.
speakers.
Use
Receive audio from the
sound board.
Voice annotation using
third-party sound boards.
Applications requiring better
audio output than that
provided by your PC's
internal speaker.
Easy front-panel access to
an external sound source.