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SOUNDEFF.PAS
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Pascal/Delphi Source File
|
1989-07-11
|
717b
|
38 lines
program soundeffect;
{ SoundEff.pas - Example program showing use of the tritone() function }
{$L ptrit_s}
uses crt;
var v1, v2, v3 : word;
procedure tritone(t,a,b,c,d:word); external;
function NextVal(var A:word):word;
begin
if A >= 8191 then
NextVal := 1
else
NextVal := A + 5;
end;
function PrevVal(var A:word):word;
begin
if A <= 1 then
PrevVal := 8191
else
PrevVal := A - 5;
end;
begin
write('Press any key to quit... ');
v1 := 1; v2 := 4050; v3 := 8191;
while not ( KeyPressed ) do begin
tritone( 512, v1, v2, v3, 6 );
v1 := NextVal(v1);
v2 := PrevVal(v2);
v3 := PrevVal(v3);
end;
end.