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 Forum index » DIY Hardware and Software » YuSynth
Wavefolder question
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brother303



Joined: Nov 02, 2010
Posts: 139
Location: ruhr-area/germany
PostPosted: Thu Sep 22, 2011 1:05 pm    Post subject: Wavefolder question Reply with quote  Mark this post and the followings unread
Hi,

one question on the wavefolder pcb : What is the purpose of the second cv-input/In3?

http://yusynth.net/Modular/Commun/WAVEFOLDER/wavefolder-layout.jpg

CV1 = Control level CV
In2 = Audio Input
In3 = ?

Thanks and kind regards
Greg
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brother303



Joined: Nov 02, 2010
Posts: 139
Location: ruhr-area/germany
PostPosted: Fri Sep 23, 2011 9:03 am    Post subject: Reply with quote  Mark this post and the followings unread
Hi,

really,nobody?!? Shocked

Yves?

Please... Crying or Very sad
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Best regards
Greg
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iopop3



Joined: May 28, 2010
Posts: 94
Location: Malmö, Sweden
PostPosted: Fri Sep 23, 2011 12:29 pm    Post subject: Reply with quote  Mark this post and the followings unread
Checking the pcb layout it looks like its an audio input directly to the second op amp (connects to pin 1 on U2a), ie. bypassing the initial VCA portion of the circuit.
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brother303



Joined: Nov 02, 2010
Posts: 139
Location: ruhr-area/germany
PostPosted: Fri Sep 23, 2011 1:06 pm    Post subject: Reply with quote  Mark this post and the followings unread
Thanks iopop,

I was asking myself if I should add a jack to the panel for this,but it seems to be less interesting.

Thanks for reply! Wink

Kind regards
Greg
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yusynth



Joined: Nov 24, 2005
Posts: 1314
Location: France
PostPosted: Sat Sep 24, 2011 10:44 am    Post subject: Reply with quote  Mark this post and the followings unread
This was a test point I added for the sake of development. It was meant to check the output of the VCA. It is not meant for panel connection but one may use it if one feels like it.
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Yves
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brother303



Joined: Nov 02, 2010
Posts: 139
Location: ruhr-area/germany
PostPosted: Sun Sep 25, 2011 6:16 am    Post subject: Reply with quote  Mark this post and the followings unread
Hi Yves,

yusynth wrote:
This was a test point I added for the sake of development. It was meant to check the output of the VCA. It is not meant for panel connection but one may use it if one feels like it.


thanks for reply,that´s very helpful. Seems like I really don´t need this on the panel...

And one more question, on another thread you said :
Quote:
Now I am not sure this will give a noticeable change in sound indeed while the offset mod will impact nicely on the sound palette. STG introduced this offset mod in his version of this wavefolder.


How to add this offset-mod to the wavefolder? Something mad or only a simple offset-voltage added to the circuit somewhere? Would you please be so kind and enlight me? Wink

Thanks and kind regards
Greg
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