Thanks, Jan-Erik. Changing the duty cycle will change the volume, I believe.
I think I've got enough spare cycles to make a software solution work, but
am hoping to be lazy and find an easy hardware solution.

Don

> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU] On Behalf Of Jan-Erik Soderholm
> Sent: Tuesday, May 18, 2004 9:37 AM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: [PIC:] Need 2nd Independent PWM for 18Fxxx
>
>
> Don Rahmlow wrote :
>
> > I need 2 independent PWMs from the 18Fxxx, enabling control of both
> > frequency and duty cycle. Purpose is to provide two
> independent audio
> > outputs where both volume and tone can be changed by the PIC.
>
> Hi.
> Doesn't answer you question maybe, but...
> You can control the tone ("pitch") of the signal using the
> PWM module, yes, but how do you control the volume (without
> using some external
> parts) ?
>
> Now, trying to answer you question... :-)
> If the frequencies are not to high, you could run a
> software-PWM routine.
>
> Jan-Erik.
>
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>

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