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IBM Presents OS/2 Software Hits 1995
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OS-2_SW_HITS_2ND_EDITION_1995.ISO
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i06
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spkrdd.doc
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1994-11-24
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IBM MMPM/2 Speaker Audio Device Driver V1.1
===========================================
This package is made up of the following files:
SPKRDD DOC22BK4 - This document
SPKRDD22 ZIP22BK4 - Binary Zipped file
The file once downloaded with the binary option, needs to be
unpacked using PKUNZIP2.
The README has been extracted:
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.
The speaker driver provides support for PCM waveform files that
are (8-bit/16-bit, stereo/mono, 11Khz-44khz).
This driver is intended for use under OS/2 2.1 or greater.
The quality of sound produced from the speaker device is low
compared to a real audio card, and will vary from machine to
machine.
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, time critical, or mission critical
application. This may include printing and mouse operation during
sound generation.
If you experience problems, you should discontinue use of the
speaker device driver.
Interrupts are enabled while the speaker is being operated, however
multitasking operation is suspended.
This software is not supported by IBM technical support channels.
License
IBM grants the right to use, reproduce, and distribute this
speaker driver software provided that (1) it is not distributed for
profit, (2) it is used only with licensed copies of OS/2 2.1,
(3) the software is not modified, (4) all copyright notices
remain with the software, (5) the end user agrees to the license.
This speaker driver is provided in 'as is' condition without
warranty of any kind and no support will be provided.
IBM and its vendors takes no responibility and is not liable for
any consequences or damages of any kind resulting from the
use or existence of this software.
IBM does not guarantee that the speaker driver software will run
on all machines. IBM is not obligated to provide any updates to
this software.
Installation
1) Install the MMPM/2 base. The MINSTALL program requires you
to select one of the subsystems in order to do an install. If
you don't already have a audio card, or CD-ROM, then you
can select Software Motion Video which doesn't require any special
hardware other than the monitor.
Reboot after this installation.
2) Place the files from the SPKRDD package into a subdirectory (i.e.
\spkrdd)
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 wish to
un-install it.
1) Edit you config.sys, and comment out the device driver line:
REM DEVICE=D:\MMOS2\SPKRDD.SYS
2) Edit MMPM2.INI and remove PCSPEAKER and SPKRDDAMP and any
refernces to these names.
Notes:
1) If you install only Software Motion Video support, and then the
speaker device driver, the Software Motion Video support will
run without audio support. This is preferable, since both
software video and the speaker driver compete for the CPU.
If however you want to try, running them both together, the
MMPM2.INI can be updated as follows. This will also cause the
audio and video to be out of sync.
£ibmdigvidplayer01|
CONNECTORS=1,3,SPKRDDAMP,1
2) The system sounds support, for which the speaker driver is intended
for, will be installed automatically by the install of MMPM/2
base. System sounds plays on the default device. If you install
support for another audio card first, then install the speaker
device driver, the other audio card will be the default. The
default can be changed in the Multimedia Setup Program.
Fixes:
1) The internal design of the drive has been modified to use a time
critical thread rather than a timer.
2) A defect causing problems with interrupt driven devices has been
fixed. It most commonly caused the mouse to lock up, but has
also caused printing problems.