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 Forum index » DIY Hardware and Software » YuSynth
ARP FILTER without input level pots
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roman_f



Joined: Jul 03, 2007
Posts: 63
Location: Moscow
Audio files: 1

PostPosted: Sat Sep 10, 2011 1:56 pm    Post subject: ARP FILTER without input level pots Reply with quote  Mark this post and the followings unread

what should i do if i don't want to use the input level pots in arp filter?
should i just connect the pcb to the input jacks? or should i place any resistor instead of the pot?

is it possible to use a 100k potentiometers instead of 47k's?
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Mongo1



Joined: Aug 11, 2011
Posts: 411
Location: Raleigh NC

PostPosted: Sat Sep 10, 2011 6:19 pm    Post subject: Reply with quote  Mark this post and the followings unread

Quote:
what should i do if i don't want to use the input level pots in arp filter?
should i just connect the pcb to the input jacks? or should i place any resistor instead of the pot?

is it possible to use a 100k potentiometers instead of 47k's?


Yes, you could connect them directly - there's already a series resistor there so that should be ok. You just won"t be able to adjust the input level if you do that

You should be able to use 100k for any of the pots except the resonance control. I'm not sure about that one. Just be sure and pay attention to the log vs linear type for the pots.

Gary
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roman_f



Joined: Jul 03, 2007
Posts: 63
Location: Moscow
Audio files: 1

PostPosted: Sun Sep 11, 2011 8:17 am    Post subject: Reply with quote  Mark this post and the followings unread

the idea is to make 1U-wide filter modules with external attenuator module to save, i'd say, a lot of space
should a make another attenuator with log pots?

as far as i understand log pots are usually for audio and line are for cv
right?
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Mongo1



Joined: Aug 11, 2011
Posts: 411
Location: Raleigh NC

PostPosted: Sun Sep 11, 2011 8:26 am    Post subject: Reply with quote  Mark this post and the followings unread

Quote:
the idea is to make 1U-wide filter modules with external attenuator module to save, i'd say, a lot of space
should a make another attenuator with log pots?

as far as i understand log pots are usually for audio and line are for cv
right?


Yes - that's normally the right thing.

What you are doing is similar to what Tony Allgood at Oakley is doing. He calls it the Filter Core approach. His filters typically have the Frequency, Control Voltage Amount, and Resonance pots. If you throw a good mixer into the same shelf, you can swap filters easily.

Gary
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