phat code I hate when they fix a bug that I use.
Main

Projects

Downloads

Articles

Links

Forum

 

View Message

Back to Messages
Peter Swinkels Wed Nov 3 2021 at 5:34 am
Recording and playing sound in Quick Basic
 
 
First the recording part:

Browsing through the sample code proviced on this website I found these snippets in "sndrec.asm":

mov     dx,BASEADDR+00Ch

loopWait:
    in      al,dx
    or      al,al
    js      loopWait
ENDM

If I understand the code correctly, it is meant to ensure a consistent recording speed regardless of the CPU speed. Correct?

I also found this code at another website:

http://www.o-bizz.de/qbtuts/mallard/sbfaq.htm

I believe the examples provided there neglected to implement the speed control code posted above. Correct?

Now the play back part, this Quick Basic plays a single sample:

    OUT CommAddr, &H10 'Give command to output a byte
    OUT CommAddr, Byte(i) 'Output value

but there is no way to control the speed. How do I ensure samples are played back at a CPU independent speed?
 
 
 
 

Reply to this Message

Name
Subject
Message

No HTML is allowed, except for <code> <b> <i> <u> in the message only.
All URLs and email addresses will automatically be converted to hyperlinks.