README.TXT
==========

This file contains additional information to supplement the 
manual. Please read all the sections before you proceed with 
the installation.


This file contains the following sections:

    1.  Environment Variables
    2.  Maximum Recording Rates For the audio hardware
    3.  Set up Mic-In Maximum Volume


1. ENVIRONMENT VARIABLES

   There are three environment variables used to signify information 
   of our audio hardware : SOUND, BLASTER and MIDI.  These variables 
   will be setup by SETPNP.EXE added in the AUTOEXEC.BAT during your 
   audio software installation.

   SOUND environment variable

   The SOUND environment variable specifies the directory location 
   of audio drivers and software.  You can type "SET" at the DOS 
   prompt and see the following line for the setting of the SOUND 
   environment variable:

             SOUND=<path>

   BLASTER environment variable

   The BLASTER environment variable specifies the base I/O address,
   interrupt number and DMA channel hardware configuration of the
   audio hardware.  You can type "SET" at the DOS prompt and see 
   the following line for the setting of the BLASTER environment
   variable:

             BLASTER=A220 I5 D1 H5 P330 T6

     Where:
            A  Specifies the audio hardware base I/O port
            I  Specifies the interrupt request line
            D  Specifies the Low DMA channel
            H  Specifies the High DMA channel
            P  Specifies the MPU-401 base I/O port
            T  Specifies the card type

   MIDI environment variable

   The MIDI environment variable specifies the MIDI file format used
   and where the MIDI data is sent to.  The MIDI data can be sent to
   FM chips or audio hardware MIDI port.  Generally, there are three
   MIDI file formats available in the market, General MIDI, Extended
   MIDI and Basic MIDI.  You can type "SET" at the DOS prompt and see
   the following line for the setting of the BLASTER environment 
   variable:

             MIDI=SYNTH:<1/2> MAP:<G/E/B>

     Where:
            SYNTH:   1  Specifies internal synthesizer (default)
                     2  Specifies audio hardware MIDI port

            MAP:     G  Specifies General MIDI file format
                     E  Specifies Extended MIDI file format (default)
                     B  Specifies Basic MIDI file format


2. MAXIMUM RECORDING RATES FOR THE AUDIO HARDWARE

   The sampling rate used for recording is largely influenced by your
   computer's main  processor.  To obtain 16-bit digital audio using
   Windows, the following maximum recording rates are suggested.

            ͻ
                    SYSTEM             RECORDING RATE    
            ͹
                                                         
                386 and above          Stereo - 44KHz    
                                       Mono -   44KHz    
                                                         
            Ķ
                                                         
                386 SX and below       Stereo - 22KHz    
                                       Mono   - 44KHz    
                                                         
            ͼ

   To obtain optimal performance, try  configuring the audio hardware 
   to use a high DMA (Direct Memory Access) channel under Windows.  
   Refer to your audio hardware Getting Started Manual for more 
   information on setting up the sound card to use a high DMA channel.


3.  Set up Mic-In Maximum Volume

    To set the Mic-In maximum volume to their desirable value.
    The following describe how this is achieved.
    SB16AUX.DRV version 2.43 and above will look for an entry
    in the SYSTEM.INI file to determine what is the Mic-In maximum
    volume to use.  This functionality will be moved into VSBPD.386
    version 3.55 and above.  The entry in the SYSTEM.INI file is:

    [sndblst.drv]
    MicInMaxVol=xx

    where xx is the desirable Mic-In Maximum volume level ranging from
    0 to ff in hex. Use SYSEDIT or any text editor to add in this entry
    into SYSTEM.INI file on the master hard disk image.


                     ******** END OF README.TXT ********
