IBM Aptiva Personal Computer
(250-0451A)                Volume Control             Faxback Doc. # 33148

Controlling the volume on multimedia systems

If you have a multimedia model of the IBM Aptiva Personal Computer, you
can control the volume in three ways:

    With the volume control on one of the speakers

    With the volume controls in the multimedia software that came with
    your system

    With the volume control on the CD-ROM drive on the front of the system
    unit (your system may not have this volume control).  This volume
    control is used solely to control headphone volume and has no effect
    on the speakers.

The method you use to control the volume depends on whether you are
listening to sound through the speakers or the headphones.

Adjusting the speaker volume

If you are listening to sound through the speakers, use the volume control
on the front of the speaker to adjust the volume.

The volume control on the front of the speaker is affected by the volume
control setting in the multimedia software that came with your computer.
For example, if you turn the volume on the speaker all the way up, and no
sound comes out of the speakers, the volume setting in your multimedia
software is too low.

The multimedia software volume controls are located in the multimedia
mixer applications.

Adjusting the headphone volume

You may be able to plug headphones into the headphone jack on the CD-ROM
drive (not available on all systems) or into the OUT jack on the sound
card on the back of the computer's system unit.

    On some IBM Aptiva PCs, a headphone jack is located on the CD-ROM
    drive on the front of the computer's system unit.

    When your headphones are plugged into the headphone jack on the CD-ROM
    drive, they will pick up only the sound coming from an ordinary audio
    CD in the CD-ROM drive.  The headphones will not pick up other sounds
    generated from your computer or any external device connected to the
    computer, such as a MIDI (Musical Instrument Digital Interface)
    keyboard.

    When your headphones are plugged into this jack, use the volume control
    on the CD-ROM drive to adjust the volume  of the headphones.  This
    volume control adjusts the volume of the headphones, but not the
    speakers.  If you want to turn the speaker volume down while using the
    headphones, use the volume control on the speaker.

    On all multimedia models of the IBM Aptiva PC, the headphones can be
    plugged into the Out jack on the sound card on the back of the system
    unit.  This is the same jack you plug your speakers into.  You must
    disconnect your speakers to use this jack with your headphones.

    If you plug your headphones into the jack on the sound card, the
    headphones will pick up all sounds generated from your computer and any
    external devices connected to the computer, such as a MIDI (musical)
    keyboard.  The headphones will also pick up sound coming from a CD in
    the CD-ROM drive.

NOTE:  When your headphones are plugged into the jack on the sound card,
       you must control the headphone volume through the volume control in
       the multimedia software on your computer.  You cannot control the
       headphone volume from the volume control on the CD-ROM drive.

       When using this jack, a few sounds may not be audible through the
       headphones, such as the beep when you turn on your computer.


(br/all-06/03/96)

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