[PD] Re: [PD-announce] PWM in Pd

[Chuckk Hubbard]

I was experimenting with this:

[num\
|
[osc~]    [num\
|         /
[+~]
|
[*~ 1000000]
|
[clip~ 0 1]

It works for making a signal just 0s and 1s, but the osc input would
have to be scaled to make the width change linearly with the control.
I guess an appropriately scaled phasor~ should do it.
I was searching for ways to create 2-bit audio in Pd, then amplify,
but I couldn't do it.


On 5/26/06, Frank Barknecht <fbar at footils.org> wrote:
> Hallo,
>
> Hans-Christoph Steiner hat gesagt: // Hans-Christoph Steiner wrote:
>
> > That  example (I am looking at K01.pulse.width.mod.pd from 0.38.4)
> > is very  simple, but as it is, it is not usable.  Notice how the LOW
> > and HIGH  change values.  PWM needs be 0 for LOW and 1 for HIGH.
>
> I just found a *veryvery* simple solution to get rid of the DC
> wandering: Just scale the signal so that it's always larger than the
> range (0,1) with e.g. [*~ 10] and then use [clip~ 0 1] to clip excess
> values outside that range. Voila, DC's gone.
>
> Ciao
> --
>  Frank Barknecht                 _ ______footils.org_ __goto10.org__
>
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