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 Forum index » DIY Hardware and Software » YuSynth
Buffering Minimoog filter
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intoodeep



Joined: Mar 14, 2010
Posts: 7
Location: los angeles
PostPosted: Tue Mar 16, 2010 8:30 pm    Post subject: Buffering Minimoog filter Reply with quote  Mark this post and the followings unread
Hi I was wondering if it's possible to just stick a simple op amp buffer after the yusynth minimoog style filter and have it not decrease low frequencies at high resonances. Yves your description suggests this but I wanted to ask and make sure it would work before trying. Thanks much!
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yusynth



Joined: Nov 24, 2005
Posts: 1314
Location: France
PostPosted: Wed Mar 17, 2010 12:23 am    Post subject: Re: Buffering Minimoog filter Reply with quote  Mark this post and the followings unread
intoodeep wrote:
Hi I was wondering if it's possible to just stick a simple op amp buffer after the yusynth minimoog style filter and have it not decrease low frequencies at high resonances. Yves your description suggests this but I wanted to ask and make sure it would work before trying. Thanks much!


Yes it would work by mixing the direct output with the feed-back signal (after the emphasis pot through a big cap).
However in this case it's no longer a Minimoog filter clone since it won't sound the same.
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intoodeep



Joined: Mar 14, 2010
Posts: 7
Location: los angeles
PostPosted: Thu Mar 18, 2010 1:43 pm    Post subject: Reply with quote  Mark this post and the followings unread
Yes sounds interesting, could have a nice character. I took another look at the schem, guess I didn't quite get what was going on as I thought the decreased low end was just a simple loading issue from the filter to the next stage, U3a should prevent that. You suggest to put a ?uf ish cap where exactly, connected before C11 and then between C12 and R31? And then also to add an op buffer after U3a or no?
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