{LANtastic(TM) Voice Programmer's Interface(TM)}

     Make your software laugh, sob, growl, warble, wail, sing and talk with
     the LANtastic Voice(TM) Adapter and the LANtastic Voice Programmer's
     Interface (VPI(TM)).

     When used in conjunction with the LANtastic Voice Adapter
     (soldseparately), LANtastic VPI makes adding sound and speech to your
     software easy. Using a set of simple, straight-forward commands, you
     can create educational and training programs on disk or CD-ROM that
     actually give verbal instructions to students. You can develop voice
     mail, "talking" software demos, music synthesis, sound effects and
     much more. Using the tape in and out jacks on the Voice Adapter, you
     can record from a CD player, tape recorder, microphone or other
     external sound source, then play back later through an amplifier with
     speakers.

     The LANtastic VPI is a set of routines for interfacing to the
     LANtastic Voice Adapter. VPI uses a structure called the Voice Command
     Block (VCB). This block is similar to an NCB or MCB in the NETBIOS. It
     contains pointers to blocks of data which can be used for PLAY and
     RECORD. Commands can be no-wait which means control returns to the
     calling program immediately while the VPI works in the background.
     When the VPI command completes, the user's POST routine is called. 

     The Artisoft LANtastic Voice Adapter is a low-cost, IBM compatible
     expansion device which converts between audio/voice signals and a
     digital data stream. When used in conjunction with supporting
     software, it provides the capability to digitize spoken messages,
     preserving them in nearly their original fidelity. 

     LANtastic VPI is sold to developers directly through Artisoft. For
     more information, call 602-293-6363. 

     {Specifications}

     {Hardware compatibility:
     
     {}    LANtastic Voice Adapter, which is compatible with IBM PC, XT, AT,
          PS/2 model 30, 30-286 and compatibles, and 386-based IBM PC bus
          compatibles. The Voice Adapter requires an 8-bit expansion slot
          and PC DOS 3.1 or higher (3.2 not recommended)

     {Basic VPI routines:

     Adapter_Status Find out about the Voice adapter 
     Reset          Reset the Voice adapter 
     Deinstall      Takes VPI out of memory 
     Cancel         Cancel a pending VCB 
     Send           Sends a buffer to PLAY channel 
     Silence        Sends silence to PLAY channel
     Receive        Receives a buffer from RECORD channel 
     Threshold      Wait for sound to reach a certain loudness and then
                    begin Receive from RECORD channel

     {External interfaces available on the LANtastic Voice Adapter: 

     {}    P1-Handset, electret, 0.2V peak-to-peak Standard female,modular
          telephone handset jack (M4P4C). Electret microphone input and
          output are supported on this connector. Telephone handset is
          provided. Electret microphone input is reproduced in the earphone
          as long as power is supplied to the board to give the handset the
          sound of a "live" line. 

     {}    P2-LINE IN, 100K Ohms@2.5V Female, RCA-type audio jack. Accepts a
          standard audio signal for digitizing from an external source. May
          be connected to a CD player, tape recorder, or other external
          device. This signal is mixed with the microphone input from P1
          and is reproduced in the earphone. 

     {}    P3-LINE OUT, 2.2K Ohms @1.2V Female, RCA-type audio jack.Provides
          a standard line-level audio signal. May be connected to a tape
          recorder or an external amplifier to record or broadcast the
          output signal.