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SPKRDD.AVL
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1993-05-03
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IBM Multimedia Presentation Manager/2
Speaker Audio DD
Version 1.1
(C) Copyright IBM Corp. 1991, 1993 All Rights Reserved.
IBM is a registered trademark of the
International Business Machines Corporation
U.S. Government Users Restricted Rights - Use, duplication or disclosure
restricted by GSA ADP Schedule Contract with IBM Corp.
Introduction
The Speaker audio device driver provide support for playing digital
audio waveform files on the standard PC speaker by using the
MMPM/2 audio system. This support is important because it allows
non-multimedia enabled systems to play short sound effects and other
short digitized sound through the PC speaker.
Caveat
The standard PC speaker was not intended to play digitized waveform
sound. In order to produce a reasonable approximation of the
sound contained in .WAV files, the device driver requires
exclusive use of the CPU for an extended period of time. This
may have undersirable effects on performance critical multitasking
such as communications, modem transfers, networking, etc.
We do not recommend that this software be used in conjunction with
communications software while communications are taking place.
If you experience problems, you should discontinue use of the
speaker device driver.
Installation
1) Place the files from this package into a subdirectory (i.e. \spkrdd)
2) Use the MINSTALL installation program from the MMPM/2 folder to
select the \spkrdd directory. Install the Speaker Driver
package by selecting the speaker driver object and pressing Install.
3) After install is complete, a reboot is required.
Configuration
The speed and volume of the sound produced by the speaker device
driver must be configured on a machine by machine basis.
1) Select the Multimedia Setup program in the MMPM/2 folder.
2) Select the speaker settings page, to customize the speed and
volume of speaker. The speaker push button will place a test
sound, that will give you some feedback on the speed and volume
adjustments.
Uninstall
If you experience problems with the speaker device driver and which to
un-install it.
1) Edit you config.sys, and comment out the device driver line:
REM DEVICE=D:\MMOS2\SPKRDD.SYS