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Radio Shack TRS-80 Model 4 - Page 398

Radio Shack TRS-80 Model 4
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CLICK/FLT
Filter
SET
devspec
CLiCK/FL
T
FILTER *KI
devspec
You can use the key-click filter to produce a tone from the sound
generator inside your computer.
In
order to use the click filter, you must SET it to this filter program,
and activate it with the FILTER command.
After you have set and activated the click filter, each time you press a
key on the keyboard, your computer produces a tone. You can use
this tone as an "auditory feedback".
You can change the pitch and duration of the tone produced by the
key-click filter. To do this, you must apply a patch to the values that
control the pitch and duration of the sound
in
CLiCK/FLT.FILTER (see
~.
the PATCH command).
The
patch is:
000,7E
=xx,yy;F00,7E = 03,00
xx is the duration of the tone. xx can be 1 - FF. 1 is the shortest
duration and FF is the longest.
yy is the pitch of the tone. yy can be 0 - FF. 1 is the highest pitch and
°or FF is the lowest.
A-100

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