Yep, on a macbook. <div><br></div><div>Right, it sounded like there was a limiter in there, although I had remembered in linux that any signal > |1.0| gets horrible clipping artefacts.<br><br></div><div>Thanks for the explanation. Cheers,</div>
<div>Rich</div><div><br><div class="gmail_quote">On Mon, Sep 12, 2011 at 4:50 AM, chris clepper <span dir="ltr"><<a href="mailto:cgclepper@gmail.com">cgclepper@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
When using the internal speakers on a Macbook a limiter is put into the CoreAudio chain. A 3rd party hardware driver won't have this though.<br><br>Since Rich says he can hear harmonics the sine wave is being clipped so things are working as expected.<div>
<div></div><div class="h5"><br>
<br><br><div class="gmail_quote">On Sun, Sep 11, 2011 at 1:57 AM, Miller Puckette <span dir="ltr"><<a href="mailto:msp@ucsd.edu" target="_blank">msp@ucsd.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0pt 0pt 0pt 0.8ex;border-left:1px solid rgb(204, 204, 204);padding-left:1ex">
Hi all --<br>
<br>
I assume this is happening on a Macintosh -- on that platform, Pd sends<br>
floating point straight to the Mac audio system. Rumor has it that the<br>
Mac might compress and/or equalize the signal on its way out, so who<br>
knows what you're actually getting. But anyway, (and probably contrary to<br>
Pd's documentation) audio isn't automatically clipped on Pd's output on<br>
Mac although it is on Linux and Windows whose audio systems are explicitly<br>
fixed point (and probably not messed with by hte system).<br>
<br>
cheers<br>
<font color="#888888">Miller<br>
</font><div><div></div><div><br>
On Sun, Sep 11, 2011 at 01:49:52AM -0400, Mathieu Bouchard wrote:<br>
> On Sun, 11 Sep 2011, Rich E wrote:<br>
><br>
> >Does anyone know why this doesn't clip?:<br>
> >[osc~ 200]<br>
> >|<br>
> >[*~ 1.5]<br>
> >|<br>
> >[dac~]<br>
> ><br>
> >I'm trying this using pd 0.43 and the audio still sounds good<br>
> >(although some extra harmonics can be heard), despite the phases<br>
> >being in the range of [-1.5, 1.5]... ?<br>
><br>
> No, you mean the amplitude is 1.5. You're not doing anything about<br>
> the phase (and anyway, it's relative, so you can only hear phase<br>
> difference, not phase).<br>
><br>
> If you hear extra harmonics, then it has to be already clipping.<br>
> What makes you think that it isn't ?<br>
><br>
> _______________________________________________________________________<br>
> | Mathieu Bouchard ---- tél: <a href="tel:%2B1.514.383.3801" value="+15143833801" target="_blank">+1.514.383.3801</a> ---- Villeray, Montréal, QC<br>
<br>
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