MMPC Model 10/20  (250-1640/41)     Audio Options      Faxback Doc. # 2569

Setting Up Audio Options

Use the connectors on the audio adapter to connect optional audio
devices.  Use the CD-ROM drive to load CDs.

CD-ROM Drive Audio

To listen to audio CDs in privacy, connect headphones to the jack on the
front panel of the CD-ROM drive.  Turn the volume control to adjust the
volume of a CD.  Press the volume control to skip to the next track of
a CD.

>  Note:  The headphone jack on the CD-ROM drive is for
   listening to CD audio.  To listen to other audio sources,
   connect the headphones to the connector on the audio
   adapter.

>  Caution:  The CD-ROM drive is factory-configured for
   proper operation with your system.  If you later add
   other devices to your system, confirm that no port
   address or interrupt set for device causes a conflict
   with the CD-ROM drive settings.  The interrupt channel
   and port address for the CD-ROM drive are set by jumpers
   on the audio adapter.  Refer to the "Audio Adapter
   Appendix" for more information.

Connecting Options to the Audio Adapter

The audio adapter is installed in the bottom expansion slot.  The
adapter's connectors and volume control are accessible from the back
panel of the computer.  Connect external devices to the audio adapter
connectors as illustrated:

Connecting a Joystick

Connect a joystick to the joystick connector of an optional MIDI/joystick
cable if you want to use a MIDI device and the joystick.  If you are not
using a MIDI/joystick cable, you can connect a standard 15-pin joystick
cable to the MIDI/joystick connector on the adapter.  See your computer
dealer to purchase a cable.

>  Note:  If you install an adapter with a game port, you
   must disable the joystick port on the audio adapter.
   To disable the adapter's joystick port, refer to the
   audio adapter appendix.

Connecting Speakers

You can connect speakers to the Line-Out connector of the audio adapter.
The audio adapter generates 4 watts when connected to 4-ohm speakers and 2
watts when connected to 8-ohm speakers.  Do not set the volume level to
maximum unless your speakers can handle the maximum unless your speakers
can handle the maximum power output.

Headphone Safety

You can connect headphones to the Line-Out connector of the audio adapter.
Before you put on headphones, set the volume to a low level.  After you
put on headphones, slowly adjust the volume to a comfortable listening
level.

>  Warning:  Listen with the volume at a moderate level.
   Extended high-volume listening can cause permanent
   hearing loss.  Because your ears become less sensative
   to sound as you become accustomed to a volume level,
   exercise caution when increasing volume after a period of
   listening.  Volume levels that do not cause discomfort
   might still damage your hearing.

Adjusting Volume

You can adjust the volume of the sound that is output through the audio
adapter with the adapter volume control.  This control is the master
volume control for all connected audio devices.  Adjust the adapter
volume to a moderate level before adjusting the volume with any other
source (such as a connected amplifier or an audio application).

Connecting an Optional MIDI Device

Use an optional Sound Blaster MIDI or MIDI/joystick cable to connect a
MIDI device to the Joystick/MIDI connector in the audio adapter.  If you
use an optional MIDI/joystick cable to connect a MIDI device to the audio
adapter, you can use the cable's joystick connector to attach an optional
joystick at the same time.  See your computer dealer to purchase a cable.

To connect an optional MIDI device such as a keyboard:

*  Connect the cable labeled MIDI OUT to the MIDI IN
   connector  of the MIDI device.

*  Connect the cable labeled MIDI IN to the MIDI OUT
   connector of the MIDI device.



(smc-02/02/94)