readmesurf.me

speech signal process tools

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.ps +4
.vw +4
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\fBREAD ME FIRST for ATT Surfboard with Ariel - 8/15/91\fR 
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.ps -2
.vs -2
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The enclosed tape with the Entropic label contains the device driver for
the AT&T Surfboard and test programs.   There may also be a tape from
AT&T included with the board.  Please use the Entropic tape, as it
incorporates some bug fixes relating to our software.
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If you orded the Surfboard and Ariel Pro-Port from Entropic, then these
have been assembled and tested and are packaged together.   The smaller
boxes contain the Surfboard manuals and accessories and the Ariel board
manual.
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Some Ariel Pro-Ports have been shipped with a P8574AP part instead of
the P8574P.  This part implements a serial interface that is used by the
Surfboard to set the sample rate on the Ariel board.   If you have the
wrong version part on your board Ariel board, you will get a message
like: iicack: bus error, sta=0x8, flag=0x0, when you do analog I/O.  To
correct this, simply define the Unix environment variable
\fBP8574_type\fR to be zero.    
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The Ariel board can have either a 24 Mhz crystal, or a 16 Mhz crystal.
Versions of Entropic software prior to ESPS 4.1, assume the 24 Mhz.
Unfortunately, this does not yield 8 Khz as an available sample rate.
There is a version of speech.sd which has been converted to 12 Khz in
\fI/usr/esps/demo\fR, under the name of \fIspeech12.sd\fR.   If you have
the Surfboard/Ariel combination, you should use this file instead of
\fIspeech.sd\fR in the \fIwaves+\fR tutorial.
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Version 4.1 of ESPS will also support the 16 Mhz crystal.