[sdiy] Auto Center waveforms

[Neil Johnson]

Hi,

Jerry Gray-Eskue wrote:

> Yes it is Audio but has the potential to go into the LFO range. The  
> DC level
> shift is pronounced and audible when hopping a few octaves. The  
> whole thing
> has to do with producing traditional analog signals in an  
> unconventional
> way.

Define what LFO range you want.  For example, I have an LFO that goes  
down to 28 minutes.  Unless the offset balancing circuit was also  
controlled by the CV then it would be designed for the worst-case.

What it does sound like is severe CV bleed-through to the output.   
Best to design it out rather than band-aid patch it out afterwards.

> The whole thing got me thinking that there has to be a elegant way  
> to remove
> DC offsets that is not AC coupled. This would be useful in general  
> for LFOs
> and Ramp based VCOs asymmetrical wave shapers and etc.

As I think Eric said, removing DC is by definition a slow process  
(how 'constant' is constant?), otherwise you're just lumping a HP  
filter on the output which will colour the sound.

Neil
--
http://www.njohnson.co.uk