[sdiy] Why dual grounds?

[cheater cheater]

reference ground vs shield ground?

On Wed, Jun 9, 2010 at 02:52, Veronica Merryfield
<veronica.merryfield at shaw.ca> wrote:
> clean and dirty
> power and signal
>
> Probably trying to keep the CV signal clean.
>
> Double check that there isn't a decoupled, artificial or some other synthesised ground and a real ground.
>
>
> On 2010-06-08, at 5:17 PM, David Ingebretsen wrote:
>
>> Still working on this Steiner Synthasystem project...
>>
>> I noticed on the keyboard schematic, Nyle very clearly uses 2 grounds. For
>> the life of me I don't see why.
>>
>> In general, why would one want two grounds in a circuit that is not a mix of
>> analog/digital and is not outputting signals for audio, just CVs?
>>
>> Where and how would these two signals come back together. His power supply
>> is "nothing special", so to speak. Just one ground from the center-tapped
>> transformer, but he clearly runs these ground signals back to the power
>> supply somewhere.
>>
>> No other module has two separate grounds.
>>
>> So, why two grounds on this, but no other module?
>>
>> I know you need to see the schematic, but I can't publish the thing. :(
>>
>> David
>>
>> _______________________________________________
>> 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
>