I have it hooked up to both.  With the piezo it sounds wimpy, but =
connected directly to my sound card it sounds kinda cool.  For such a =
simple bit of code, that is.

Oh, if you tried it, I apologize.   I wasn't totally complete.  The =
prescaler is set to 16:

; PWM Configuration
        movwf           TRISB
        banksel T2CON
        movlw           b'00000111'                     ; prescaler
        movwf           T2CON


(oh, be sure and set the volume very low to begin with.)


> Subject: Re: [PIC]: Making sounds with Pics
>=20
> Hey Lindy,
> I'm curious, are you hooking this up to a piezo or some other
> speaker?
>=20
>=20
> Lindy Mayfield wrote:
>=20
> >>Texas Instruments used to make the SN76477 and the SN76496.
> >>These are listed as "sound generators" and were meant to be
> >>used in video games to produce a variety of sound effects.
> They
> >>contained a noise source and various envelope generators.
> >>The former chip (and maybe the latter) are no longer made, but
> >>the
> >>data sheets may be available somewhere. They showed how
> various
> >>sounds were synthesized; this might give you some ideas.
> >>
> >>John Power
> >
> >
> > This is an interesting subject.  I was looking at the embedinc
> website on their HAL project, and how they use PWM to make all
> sorts of sounds.  It went right over my head, but it gave me
> ideas to experiment with.
> >
> > Just the PWM output from this code produces a sound like a
> motor, sort of like the one from Pink Floyd's Welcome to the
> Machine:
> >
> > test
> >         banksel T2CON
> >         btfss           T2CON,TMR2IF
> >         goto            $-1
> >         banksel CCPR1L
> >         decf            CCPR1L,f
> >         banksel PR2
> >         incf            PR2,f
> >         goto            test
> >
> > So it got me to thinking that with the proper algorithms and
> maybe a little help from some simple wave shaping components,
> one could get an awful lot of good sounds from a PIC easily.
> >
> > Make the input voltage controlled and then it would be easy to
> build a sonar or IR controlled Theremin, or as another PIC
> project create a midi to control voltage converter.
> >
> > It also got me to thinking about the difference between using
> tables to produce a wave as opposed to using an algorithm.
> >

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=20

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