Sharp PC-9080 Manual page 72

Audio Features
The notebook's audio capabilities include the following features:
Digitized audio playback capability (up to 44kHz), which faithfully plays back
and reproduces all kinds of digitized sounds with a 16-bit Digital-to-Analog
Converter (DAC). The audio system works with a number of applications that
utilize the digital voice channel to deliver realistic human speech and sound
effects.
Digitized audio recording capability (up to 44kHz) allowing digitization and
recording of any kind of sound through the notebook's built-in microphone or an
external source.
High quality sound, dynamically filtered for low noise digital recording and
playback. Input from the notebook's built-in microphone uses Automatic Gain
Control (AGC) to compress sound input to adapt dynamically to different
recording conditions.
Audio compression which offers real-time compression and decompression of
digital audio. Compression turns large sound files into smaller files that can easily
be stored and transferred to a diskette or even sent over a network.
Built-in power amplifier and speaker, including volume control, and an audio out
port for connection to an external pair of stereo headphones or speakers.
1. When using the built-in microphone
For recording, make sure AGC is on and turn down the speaker
volume to avoid audio feedback.
For playback, with AGC off, turn down the speaker volume or
mute the microphone to avoid audio feedback.
2. When using an external microphone, make sure AGC is on.
Using Your Notebook 3-27
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