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 Forum index » DIY Hardware and Software » YuSynth
Getting ADSR closer to Ground when gate is off
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El Mop



Joined: Aug 20, 2012
Posts: 54
Location: Germany

PostPosted: Sun Dec 30, 2012 4:29 am    Post subject: Getting ADSR closer to Ground when gate is off Reply with quote  Mark this post and the followings unread

I´ve built 3 ADSR envelopes, which work great after changing D2 and D3 to a BAT41.
Now I´m trying to get the envelope closer to Ground when gate is off.
I was trying it first in LTSpice by changing R8 to 1R and R9 to 470k,
which worked great in LTSpice, where it comes down to 9mV with gate off.
So I changed it on the PCB that way, which makes the envelope stay almost at ground when gate is off,
but now I get only around 2V max output and the enveope behaves "strange".

Anybody got an idea, how to make the envelope comes closer to ground when gate is off?
Thank you in advance.
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roglok



Joined: Aug 28, 2010
Posts: 159
Location: uptown

PostPosted: Sun Dec 30, 2012 7:18 am    Post subject: Reply with quote  Mark this post and the followings unread

nordcore proposed some modifications to the yusynth adsr on german synth forum sequencer.de to get rid of this behaviour. i did them to mine - works great!

here's the thread (in german):
http://www.maschinensound.de/viewtopic.php?f=13&t=54153

and schematic incl. mods:
http://www.sequencer.de/synthesizer/download/file.php?id=2747&mode=view

note that you need to change the timing caps to film types for the mod to work properly...

EDIT:

just realised you are german Smile viel erfolg!
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El Mop



Joined: Aug 20, 2012
Posts: 54
Location: Germany

PostPosted: Sun Dec 30, 2012 7:41 am    Post subject: Reply with quote  Mark this post and the followings unread

Thank you!
Will give it try.
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