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VPI.TXT
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1991-10-15
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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 (sold
separately), 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.