QB64 sound 0,0

[imeixner]

I have to generate a continuous tone and to vary the frequency per cursor-keys.
The only way is to generate a longer sound and to stop it, if a key is pressed.

In QBASIC it works if I generate this tone for example by "sound 400,10000".
If a key is pressed, I stop this tone by "sound 0,0" and then generate an new tone with the modyfied frequency.

In QB64 "sound 0,0" does'nt stop the sound! So I do'nt know how I could stop it!

Thanks Ingomar

[burger2227]

Could you post an example for me to see what exactly you are doing.

SOUND also creates code execution delays in QB that won't happen in QB64.

[burger2227]

I reported the incompatibility at QB64:

Code: Select all

SOUND 400, 500

SLEEP 10

PRINT "stop"
SOUND 0, 0  'stop previous
SOUND 300, 100 'new

[imeixner]

Exactly!

Here is my program:
The frequency is varyied by the cursor-keys:
page up/down: 1 oktave
cursor right/left: 1 halftone
cursor up/down: 1/12 of a halftone



REM Frequenzvergleich
CLS
GOSUB kopf
farbe = 3
meldg$ = "Frequenz „ndern: Pfeil- und Bildtasten; Pause: Leertaste; Ende: Esc"
GOSUB meldung
boxx = 16: boxy = 9: breite = 46: hoehe = 7
COLOR 0, 7
GOSUB box: GOSUB textvor
tastmoeg$ = " IQMKHP" + CHR$(27)
DIM fakt(7)
fakt(0) = 1: fakt(1) = 1: fakt(2) = 2: fakt(3) = 1 / 2
fakt(4) = 2 ^ (1 / 12): fakt(5) = 2 ^ -(1 / 12)
fakt(6) = 2 ^ (1 / 144): fakt(7) = 2 ^ -(1 / 144)
freq = 440
tast = 0
DO
freq = freq * fakt(tast)
IF freq < 55 THEN freq = 55 ELSE IF freq > 7040 THEN freq = 7040
LOCATE 12, 40: PRINT USING "#####"; freq
SOUND 0, 0
SOUND freq, 10000
DO
tast$ = INKEY$
LOOP UNTIL tast$ > ""
tast$ = RIGHT$(tast$, 1)
tast = INSTR(tastmoeg$, tast$)
IF tast = 1 THEN SOUND 0, 0: SLEEP
LOOP UNTIL tast = 8
SOUND 0, 0
SYSTEM

textvor:
LOCATE 12, 29: PRINT "Frequenz:"; TAB(46); "Hz"
RETURN
kopf:
COLOR 7, 3: CLS
COLOR 15, 1
PRINT TAB(80); " ";
PRINT TAB(27); "*** F R E Q U E N Z ***"; TAB(80); " "
PRINT TAB(80); " ";
COLOR 3
PRINT TAB(29); "(C) 1999 by I. Meixner"; TAB(80); " ";
RETURN
meldung:
COLOR farbe, 1
LOCATE 25, 1: PRINT TAB(41 - LEN(meldg$) / 2); meldg$; TAB(80); " ";
RETURN
box:
LOCATE boxy, boxx: PRINT "É"; STRING$(breite - 2, "Í"); "»"
FOR ix = 1 TO hoehe - 2: LOCATE , boxx: PRINT "º"; SPC(breite - 2); "ºÛÛ": NEXT
LOCATE , boxx: PRINT "È"; STRING$(breite - 2, "Í"); "¼ÛÛ"
LOCATE , boxx + 2: PRINT STRING$(breite, "Û");
RETURN