[sdiy] saw to tri/sine options

[Ian Fritz]

I have posted an mp3 comparing the rounded vs straight Saw on the e-m forum:
http://electro-music.com/forum/viewtopic.php?p=247574#247574
The rounded waveform has relatively less even-harmonic content so its not 
quite as buzzy.

And of course there is no frequency division -- the waves have the same period.

   Ian


At 08:55 AM 6/2/2009, Jerry Gray-Eskue wrote:

>I have had some time to think through what the sine function would do in
>relation to the original ramp or saw wave and have a postulate:
>
>With a triangle wave centered on 0 volts we get all 4 quadrants of the sine
>wave generated over the same period so the Frequency out = Frequency in.
>
>With a ramp or saw centered on 0 volts we get 2 quadrants of the sine wave
>generated over the same period so the Frequency out = Frequency in/2.
>
>With a ramp or saw offset to all positive or negative (i.e. 0v - 10v) we get
>1 quadrant of the sine wave generated over the same period so the Frequency
>out = Frequency in/4.
>
>
>
>-----Original Message-----
>From: synth-diy-bounces at dropmix.xs4all.nl
>[mailto:synth-diy-bounces at dropmix.xs4all.nl]On Behalf Of Kyle Stephens
>Sent: Monday, June 01, 2009 10:25 PM
>To: synth-diy at dropmix.xs4all.nl
>Subject: Re: [sdiy] saw to tri/sine options
>
>
>
>A little out of idle curiosity (and to better under stand how the concept
>works), what happens when you put a non-triangle wave through a tri to sine
>waveshaper?
>
>Say you use a saw, does that get you a halfway-there sine? By my same
>possibly misplaced logic, would a square wave not be affected much, if at
>all?
>
>I at least haven't seen something like that before, so guess the results
>aren't all that interesting?
>
>
>_Kyle
>
>--- On Mon, 6/1/09, mark verbos <mverbos at earthlink.net> wrote:
>
> > From: mark verbos <mverbos at earthlink.net>
> > Subject: Re: [sdiy] saw to tri/sine options
> > To: "Synth DIY" <synth-diy at dropmix.xs4all.nl>
> > Date: Monday, June 1, 2009, 5:17 PM
> > These are essentially time
> > independent. They are just a transfer
> > function of voltage in to voltage out. So, perfectly. I
> > would think.
> >
> > Mark
> >
> >
> >
> >
> > On Jun 1, 2009, at 6:07 PM, Jerry Gray-Eskue wrote:
> >
> > >
> > > I am curious, How well do these hold the waveform peak
> > to peak
> > > voltage and
> > > sine wave shape from low to high end frequencies?
> > >
> > >
> > >
> > > -----Original Message-----
> > > From: synth-diy-bounces at dropmix.xs4all.nl
> > > [mailto:synth-diy-bounces at dropmix.xs4all.nl]On
> > Behalf Of mark verbos
> > > Sent: Monday, June 01, 2009 4:14 PM
> > > To: Scott
> > > Cc: Synth DIY
> > > Subject: Re: [sdiy] saw to tri/sine options
> > >
> > >
> > >
> > > On Jun 1, 2009, at 4:37 PM, Scott wrote:
> > >
> > >> I'm trying to pick out a saw to tri/sine converter
> > for a VCO I'm
> > >> building (j.h.living).  Is there much
> > difference between the various
> > >> types?  Looking through my bookmarks I see a
> > few..
> > >>
> > >> Bergfotron uses transistors
> > >> http://hem.bredband.net/bersyn/VCO/Saw%20to%20tri-sin%20W.gif
> > >
> > > This was pulled from the Moog Modular I believe.
> > Jörgen seems to like
> > > it a lot.
> > >>
> > >>
> > >> ASM uses diodes
> > >> http://www.elby-designs.com/asm-2/vco/vco1-shaper-asm2-cct.pdf
> > >
> > > This one is also used by Doepfer. It's light on parts,
> > but high on
> > > harmonic distortion.
> > >
> > >
> > >>
> > >>
> > >> rwilson uses a 13700 (nothing direct, but it's on
> > the VCO schematic)
> > >>
> > >
>http://www.musicfromouterspace.com/analogsynth/VCO200604REV01/vcoschematicpa
> > > ge2.gif
> > >>
> > >> Thanks!
> > >>
> > >>
> > >>
> > >> _______________________________________________
> > >> Synth-diy mailing list
> > >> Synth-diy at dropmix.xs4all.nl
> > >> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
> > >
> > >
> > > _______________________________________________
> > > Synth-diy mailing list
> > > Synth-diy at dropmix.xs4all.nl
> > > http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
> > >
> > > _______________________________________________
> > > Synth-diy mailing list
> > > Synth-diy at dropmix.xs4all.nl
> > > http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
> >
> >
> > _______________________________________________
> > Synth-diy mailing list
> > Synth-diy at dropmix.xs4all.nl
> > http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
> >
>
>
>
>
>_______________________________________________
>Synth-diy mailing list
>Synth-diy at dropmix.xs4all.nl
>http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>
>_______________________________________________
>Synth-diy mailing list
>Synth-diy at dropmix.xs4all.nl
>http://dropmix.xs4all.nl/mailman/listinfo/synth-diy