Synth-DIY Yahoo! Groups Archives

Thread

switchable Arp filter mods

2014-01-09 by gino wong

I want to add a ladder filter to my Arp Oddy on a single switch.. There is a DIY board layout on the web. Anybody have any off the shelf suggestion or alternative implementation scheme ?

Not off topic guys. DIY support is ok on this list.

Gino Wong Birgelo

BSComm, BSEE,

ReRED Recording, Analog Sound Design

Audio Mastering, Recording & Restoration, Logistics

Ginowong@...

Re: switchable Arp filter mods

2014-01-09 by o.z.hall@att.net

Forgive my restatement of the obvious, but I would buy the MOTM ladder board + components ($100 w/Shipping). Should not take long to assemble.
Alternately, buy the DOTCOM version & remove the assembled pcb ($200).
Note that there are a couple of controls (Freq/Res) which you'll probably have to add (perhaps as small knobs on the back?). For audio in/out & control you could tap off of the Oddy and be in good shape.

http://bridechamber.com/MOTM_490.html

--- In ModularSynthPanels@yahoogroups.com, gino wong <ginowong@...> wrote:
>
> I want to add a ladder filter to my Arp Oddy on a single switch.. There is
> a DIY board layout on the web. Anybody have any off the shelf suggestion
> or alternative implementation scheme ?
>
> Not off topic guys. DIY support is ok on this list.
>
> --
>
> *Gino Wong Birgelo*
> BSComm, BSEE,
> ReRED Recording, *Analog Sound Design*
> *Audio Mastering, Recording & Restoration, Logistics*
>
> *Ginowong@... <Ginowong@...>*
>

Re: [ModularSynthPanels] switchable Arp filter mods

2014-01-09 by Robert Smith

If you can wait a few months, i will have a very tiny ladder filter pcb fully populated with SMD components for sale. I have a source for matched transistors in a single package at a very reasonable price. The pin spacing is 0.65mm but I have used them before.

Rob Smith

On Jan 8, 2014 11:57 PM, "gino wong" <ginowong@...> wrote:

I want to add a ladder filter to my Arp Oddy on a single switch.. There is a DIY board layout on the web. Anybody have any off the shelf suggestion or alternative implementation scheme ?

Not off topic guys. DIY support is ok on this list.

--

Gino Wong Birgelo
BSComm, BSEE,

ReRED Recording, Analog Sound Design
Audio Mastering, Recording & Restoration, Logistics

Ginowong@...

RE: switchable Arp filter mods

2014-01-10 by <makeme1witheverything@...>

Is this something that others have done? It seems like something that wouldn't be so easy to do with just one switch. Sure, you could switch the ins and outs from the respective filters with a DPDT switch, but you couldn't share the controls, so either you'd need to add at least 2 knobs/sliders to the front, or come up with a fancier switching scheme. Relays? Some kind of digital switch? To share the controls, you'd need to be switching at least 6 wires, maybe more.