home *** CD-ROM | disk | FTP | other *** search
- {.PTEPSON} { Only Processed If This File Is Listed By Itself }
- {.MHTest Library For Turbo Pascal Source Code Lister - @D - @T} { This too! }
- {.MFVersion ##1.0 Page - # -} { This too! }
- {.PA}
- {
- Play -
-
- This procedure will play a note in octave duration milliseconds.
- The frequency is computed by first computing C in Octave then
- increasing the frequency by Note-1 times the twelfth root of 2.
- If the duration is zero the note will be played until you activate
- the procedure NoSound.
-
- }
- procedure Play(Octave,Note,Duration: integer);
-
- var
- Frequency: real;
- I: integer;
-
- begin { Play }
- Frequency:=32.625;
- { Compute C in Octave }
- for I:=1 to Octave do Frequency:=Frequency*2;
- { Increase frequency Note-1 times }
- for I:=1 to Note-1 do Frequency:=Frequency*1.059463094;
- if Duration<>0 then
- begin
- Sound(Round(Frequency));
- Delay(Duration);
- NoSound;
- end else Sound(Round(Frequency));
- end; { Play }
-
- {.PC20}
- {
- SoftAlarm -
-
- This procedure will play the notes G and D in octave three,
- seven times, each with a duration of 70 milliseconds.
-
- }
- procedure SoftAlarm;
- var
- I: integer;
-
- begin { SoftAlarm }
- for I:=1 to 7 do with Notes do
- begin
- Play(4,G,70);
- Play(4,D,70);
- end;
- Delay(1000);
- end; { SoftAlarm }
-
- {.PC15}
- {
- Sirene -
-
- This procedure demonstrates the method used to generate
- a sirene like sound.
-
- }
- procedure Sirene;
- var
- Frequency: integer;
-
- begin { Sirene }
- for Frequency:= 500 to 2000 do begin Delay(1); Sound(Frequency); end;
- for Frequency:=2000 downto 500 do begin Delay(1); Sound(Frequency); end;
- end; { Sirene }