MS20 Inspired VCO WIP

ericcoleridge · Joined: Jan 16, 2007 Posts: 889 Location: NYC

Any updates on this MS20 inspired VCO?

brother303 · Joined: Nov 02, 2010 Posts: 139 Location: ruhr-area/germany

Hi,

still interested in this,too.

Wink

Werebear · Joined: Nov 23, 2009 Posts: 63 Location: UK

Hi Pantheon

The Bear here. Lovely work on the vco and way out of my league of understanding. I'm at the stage of breadboarding and if it works great and if it still works on stripboard then even better.

I have an extremely cheeky question which goes back to my post about tempcos/thermisters.

Where are you getting your 1K PTC thermisters/tempcos from? I am in the UK and am having trouble locating PTCs. Lots of NTC but none of the good stuff. Am I just punching the wrong descriptions into Mouser/Farnel/RS/Rapid... ?

Thanks

Werebear

vladosh · Posted: Mon Sep 26, 2011 6:33 am Post subject:

Greetings folks
Just made a veroboard layout for the MS20 VCA .. did it according to the schematic from Marjan's site ,my idea was to make a MS20 VCA and VCF on one panel ,but just not sure if the VCA would work on 12 v , i'll do also the simpler no OTA version of the vcf . So any suggestions if i should mod them to work on -/+ 12 v .. ?
thanks
Vlad

E.A.S. · Joined: Aug 16, 2011 Posts: 3 Location: Brooklyn, NY

Hi guys,
I saw this thread and thought some of you guys would be interested in my "miss 10" project thread over at muffwiggler.

http://www.muffwiggler.com/forum/topic-38676.html

-Mike

Satindas · Joined: Mar 26, 2011 Posts: 42 Location: uk

Am I reading this incorrectly, or is this whole thread a perfect example of plagiarism exposed ?
In the search for a better understanding of the basic saw core and its use in a design I had in mind, there I was, reading with eagerness, the development of what seemed like a genuine attempt to contribute to this fine sdiy repository with the expectation that there might be some final pcb layout or schematic when all of a sudden ... Nothing !
Could this be perhaps, in no small part due to the timely appearance of the honourable and reverend Dr Lanterman who in his retort, makes subtle and yet crippling references to materials previously posted? Or could it be that Dr Lanterman was himself quite bewildered in his attempt to understand this circuit and thought that perhaps some hitherto unknown "noob" to synth circuit design and electronics in general just might be able to cast light where there was only darkness and confusion. I suspect the former case to be true, due in no small part to the fact that the OP seems to have completely lost all interest in this forum following Dr Lantermans post.
Please forgive me if I'm totally off course with this and I know its an old thread but it looks like this just fizzled. If this is what it looks like it should serve as a reminder to everyone that plagiarism sucks and if you're caught at it,the only person really harmed is yourself.

m.o · Joined: Jul 05, 2014 Posts: 44 Location: Sweden

Satindas · Joined: Mar 26, 2011 Posts: 42 Location: uk

Hi, m.o
Like I said, please forgive me if I've got this completely wrong but it looked to me as though the OP had posted work which he claimed to be his own. Some way into the project Dr Lanterman appears and asks for assistance in getting this circuit to work. Why on earth would one of the most well known and respected figures in the synth electronics world today ask for assistance from a self declared "newb". To me it was like " Hey, I know what you're up to", you know, like a "shot across the bows", so to speak. Then not a single subsequent post by the OP on this whole forum. Kinda strange don't you think?

vladosh · Posted: Fri Mar 06, 2015 6:47 am Post subject:

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acidblue · Joined: Jun 26, 2009 Posts: 226 Location: The Darkside

Oh No! this thread didn't just die, did it?

Oh damn it!

abovenyquist · Joined: Aug 31, 2009 Posts: 55 Location: Atlanta

abovenyquist · Joined: Aug 31, 2009 Posts: 55 Location: Atlanta

[quote="m.o"]

abovenyquist · Joined: Aug 31, 2009 Posts: 55 Location: Atlanta

Pantheon · Joined: Feb 17, 2011 Posts: 36 Location: Edinburgh

Hi all,

I just wanted to try and clear up what seems to be some misunderstanding.

I hoped I was always clear that this was a project taking the original design for the MS20 VCO and giving it a little polish as best I could.

I didn’t leave this thread because of anything 'abovenyquist' said, I left because my own personal circumstances were not great and I had no time or money after a while to pursue this project. I felt bad about that since I had put in a ton of time, and others too were quite eager to see this project come to fruition

I had also unfortunately managed to miss 'abovenyquist''s first post where you were asking for help. I must say, I wish I had some kind of 'Electronics for Music Synthesis' class near me that I could have attended, it sounds fantastic. As for the problem you had, did you ever solve it? I would have suggested dropping the entire sync circuit, and also trying to use discrete transistors rather then the transistor array.

I’m still in half a mind as to whether to resurrect this project as I do have some time now.
At the very least I can try to dig out the original spice files and put them up on github or something for others to try out.