Florian,

My understanding (peter correct me if I'm wrong) is that any VCO design
uses a primary oscillator (core) whose output will be a waveform
(Triangle or sawtooth for example) and any other types of waveform are
constructed from this primary waveform using waveshaping circuits,
rectifiers etc.

It seems that whatever waveform you start with will impart a timbral
characteristic on the other waveforms.

This is quite odd when you think about it as a sine wave is a sine wave,
a waveshape that produces the fundamental with no harmonics.

However no waveshaper is perfect and that's why if you look at two sine
waves from different VCO's on a scope (with enough resolution) they are
never perfect just close. It's the imperfections that alter the sound
characteristic.

Regards

David



David Salter
Reuters Ltd
UKI Project Management
Tel. +44 207 542 2402
Fax. +44 207 542 2699
Email. david.salter@...
Reuters Messaging. david.salter.reuters.com@...

-----Original Message-----
From: Florian Anwander [mailto: Florian.Anwander@... ]
Sent: 23 June 2004 13:18
To: Doepfer_a100@yahoogroups.com
Subject: [Spam] Re:[Doepfer_a100] Re: Audio Samples: My VCO


Hi David and Peter

> I never realised how much of a difference a tri core makes

over a saw

> core.

Sorry for my lacks of english, but what does "core" mean in this
case
The basic waveform the bare VCO is producing (as the Curtis
CEM3340 does
triangle, the moogish VCOs like the A110 does saw)


Florian




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