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

padawan12 padawan12 at obiwannabe.co.uk
Fri May 26 11:39:18 CEST 2006

Very true. The DC blockers in most s/c are going to be limiting.
But there's no reason to assume people using Pd for more serious
experimental applications won't use correct DAC hardware. I think
its very exciting to see the emergence of Pd as an application 
for wider research in engineering, rapid prototyping etc and I
applaud HC for thoroughness and attention to detail in the code.
The beauty of sw over hw is extensibility, on a 64 bit system
you could use this to position a radio telescope or whatever, far
beyond the grain you'd ever get with 7bit microcontrollers.

On Thu, 25 May 2006 13:24:16 -0400
Martin Peach <martinrp at alcor.concordia.ca> wrote:

> Hans-Christoph Steiner wrote:
> > I should say, I forgot that PWM was used in synthesis some, so I was  
> > thinking about electronics and control when I was talking about PWM.   
> > That's why my PWM objects are tailored towards, but should work fine  in 
> > the audio context too, unless you need the wandering DC offset.
> For controlling things with PWM I think you'll need to modify your sound 
> card if you want DC output. AFAIK they all have capacitors on the ouput 
> to block DC. I find it easier to program a PIC to do the PWM and talk to 
> it from PD using MIDI continuous controller messages for 14-bit 
> resolution, or noteon with velocity meaning pulsewidth for 7-bits.
> Martin
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