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 Forum index » DIY Hardware and Software » YuSynth
Wavefolder input level
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ungleichklang



Joined: Dec 03, 2011
Posts: 62
Location: East-Belgium
PostPosted: Mon Dec 19, 2011 2:25 pm    Post subject: Wavefolder input level
Subject description: question on R21 of the wavefolder layout		 Reply with quote  Mark this post and the followings unread
Hi all,

first of all I must say, that I'm not an geek in electronics, but still build modules, so excuse my primitive questions.
I finished the wavefolder and selected an 680 ohm resistor to the position of R21.
In the layout it says I can use a 330 ohms resistor, depending on the inout level.
Could someone explain please what the difference between those to means??
Does it fold more or less or can I simply input higher/lower audio??

Thanks
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greetings from belgium, Sascha

My new blogspot: http://ungleichklang.blogspot.com
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Linux Musician
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Mongo1



Joined: Aug 11, 2011
Posts: 392
Location: Raleigh NC
PostPosted: Tue Dec 20, 2011 2:49 pm    Post subject: Reply with quote  Mark this post and the followings unread
Quote:
Could someone explain please what the difference between those to means??
Does it fold more or less or can I simply input higher/lower audio??


It looks to me like that resistor is just part of an attenuator that reduces the signal level. If you had a very high level, you'd probably want to use the lower value resistor. If you have a very low signal you'd probably want a higher value.

I'm sure Yves designed this board for normal synth audio signals. If you are using something else, you might have to change the resistor. If you are connecting to other synth modules, the 680 will probably work fine.



Gary
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hv0190



Joined: Apr 18, 2011
Posts: 20
Location: Munich
PostPosted: Fri Dec 23, 2011 12:08 am    Post subject: Reply with quote  Mark this post and the followings unread
Correct me if I'm wrong as I'm still a noob, but as far as I understand R21 and R18 determine the pp level, cp. this thread:
http://electro-music.com/forum/viewtopic.php?highlight=wavefolder&t=28155
So with the values given by Yves you'll have a 20V pp signal ...
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Mongo1



Joined: Aug 11, 2011
Posts: 392
Location: Raleigh NC
PostPosted: Fri Dec 23, 2011 6:39 am    Post subject: Reply with quote  Mark this post and the followings unread
Thanks for the pointer - interesting reading!
Gary
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ungleichklang



Joined: Dec 03, 2011
Posts: 62
Location: East-Belgium
PostPosted: Mon Dec 26, 2011 11:52 am    Post subject: Reply with quote  Mark this post and the followings unread
Yes, thanks hv0190, really good link Smile
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greetings from belgium, Sascha

My new blogspot: http://ungleichklang.blogspot.com
My Youtube-Channel: http://www.youtube.com/user/ungleichklang
My old google-site: https://sites.google.com/site/ungleichklang/home/s-diy

Linux Musician
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