Yep, on a macbook. 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.
Thanks for the explanation. Cheers, Rich On Mon, Sep 12, 2011 at 4:50 AM, chris clepper <cgclep...@gmail.com> wrote: > 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. > > Since Rich says he can hear harmonics the sine wave is being clipped so > things are working as expected. > > > > On Sun, Sep 11, 2011 at 1:57 AM, Miller Puckette <m...@ucsd.edu> wrote: > >> Hi all -- >> >> I assume this is happening on a Macintosh -- on that platform, Pd sends >> floating point straight to the Mac audio system. Rumor has it that the >> Mac might compress and/or equalize the signal on its way out, so who >> knows what you're actually getting. But anyway, (and probably contrary to >> Pd's documentation) audio isn't automatically clipped on Pd's output on >> Mac although it is on Linux and Windows whose audio systems are explicitly >> fixed point (and probably not messed with by hte system). >> >> cheers >> Miller >> >> On Sun, Sep 11, 2011 at 01:49:52AM -0400, Mathieu Bouchard wrote: >> > On Sun, 11 Sep 2011, Rich E wrote: >> > >> > >Does anyone know why this doesn't clip?: >> > >[osc~ 200] >> > >| >> > >[*~ 1.5] >> > >| >> > >[dac~] >> > > >> > >I'm trying this using pd 0.43 and the audio still sounds good >> > >(although some extra harmonics can be heard), despite the phases >> > >being in the range of [-1.5, 1.5]... ? >> > >> > No, you mean the amplitude is 1.5. You're not doing anything about >> > the phase (and anyway, it's relative, so you can only hear phase >> > difference, not phase). >> > >> > If you hear extra harmonics, then it has to be already clipping. >> > What makes you think that it isn't ? >> > >> > _______________________________________________________________________ >> > | Mathieu Bouchard ---- tél: +1.514.383.3801 ---- Villeray, Montréal, >> QC >> >> > _______________________________________________ >> > Pd-list@iem.at mailing list >> > UNSUBSCRIBE and account-management -> >> http://lists.puredata.info/listinfo/pd-list >> >> >> _______________________________________________ >> Pd-list@iem.at mailing list >> UNSUBSCRIBE and account-management -> >> http://lists.puredata.info/listinfo/pd-list >> > > > _______________________________________________ > Pd-list@iem.at mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list > >
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