[sdiy] VCO - sine output - why bother?

[Quincas]

I have another question about the sinewave issue (btw I love my sines, use them all the time, but only the filters in oscillation give me perfect sines)
Is there not a way to make a sine core oscillator and derive the other waves from it? Like a filter with fixed high resonance for the sine, a comparator for the square etc...
Why doesn't anybody do that?

Quincas Moreira

> On 26/08/2016, at 6:25 a.m., ijfritz at comcast.net wrote:
> 
> Huge difference between Sin and Tri when doing Ring Modulation or audio rate FM.
> 
> Ian
> 
> 
> Sent from XFINITY Connect Mobile App
> 
> ------ Original Message ------
> 
> From: Steve
> To: 'synth-diy DIY'
> Sent: August 26, 2016 at 2:32 AM
> Subject: [sdiy] VCO - sine output - why bother?
> 
> Now I'm not a super synth expert, also not in sound design with such.
> What I've always wondered, if I look at VCO circuits, why people go to the lenghts that they do wave-shaping a more or less pure sine as a waveform output, my heart ached when I saw a circuit that used an OTA + yet other stuff just for that.
> What more does a dedicated sine output provide that one can't get with using triangle -> lowpass VCF with keyboard tracking on? So maybe it doesn't shave off all harmonics totally, but is the sound difference really that big?
>  
> Steve
>  
> Gesendet: Freitag, 26. August 2016 um 06:42 Uhr
> Von: "David G Dixon" <dixon at mail.ubc.ca>
> An: "'Quincas Moreira'" <quincas at gmail.com>, "'Richie Burnett'" <rburnett at richieburnett.co.uk>
> Cc: "'synth-diy DIY'" <synth-diy at dropmix.xs4all.nl>
> Betreff: Re: [sdiy] SAW core VCO flyback time
> I stopped building sawcore VCOs because I didn't like flyback.  That's why I only build tricores now, and shape them into saws.  They sound better anyway, and sync in a more interesting way.
>  
> From: Synth-diy [mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of Quincas Moreira
> Sent: Thursday, August 25, 2016 5:41 PM
> To: Richie Burnett
> Cc: synth-diy DIY
> Subject: Re: [sdiy] SAW core VCO flyback time
>  
>  
> crickets....
>  
> lol.  I wish I was enough of a badass designer to be able to brag on this thread ;)
>  
>  
> Cheers
>  
> -Quincas
>  
>> On Tue, Jul 5, 2016 at 7:10 AM, <rburnett at richieburnett.co.uk> wrote:
>> What sort of reset times are people getting with their sawtooth-core analogue VCO designs?
>> 
>> I'm curious what figure is the current state of the art.
>> 
>> -Richie,
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>> Synth-diy at dropmix.xs4all.nl
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>  
>  
> --
> Quincas Moreira
> Test Pilot at VBrazil Modular
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