Re: [amsat-bb] 2 x Soundcards in PC

[Bob Bruninga <bruninga@xxxxxxxx>]

Concerning how to do two soundcards in one PC,

Dont forget that with just 8 resistors feeding an audio amp, on the LPT1
Parallel port of ANY ole' pc, you can get 8 bit fidelity by sending 8bit
WAV files out the LPT1 port.

I use this for generating speech for simple dos programs.  The following
BASIC program will send out an 8bit mono WAVE file is only 8 lines:

--------------------------------------------------------------
 N=2                       'adjust N for the speed of your PC.
                           'N =2 works for my 25 MHz laptop
 OPEN "xxx.wav" FOR INPUT AS #1
 DO UNTIL EOF(1)
    A$=INPUT$(1,1)
    OUT 888, ASC(A$)
    FOR J = 1 to N: NEXT
 LOOP                     'actually it should not start outputting data
 CLOSE                    'until the 60th byte, but out of 8000 bytes a
 END                      'second, the added code is not worth destroying
                          'the simplicity of this example.
--------------------------------------------------------------------

No this will not meet the original posters needs, but if you only need
a second card for OUTPUT only, then this might help...

I use this with my APRStt TOUCH-TONE system so that APRStt can speak back
to the DTMF user with an HT, any APRS data he needs to know.

See http://www.ew.usna.edu/~bruninga/aprstt.html

 de WB4APR@amsat.org, Bob


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