SH101 second ADSR

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isak
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SH101 second ADSR

Post by isak » Sun Aug 29, 2010 8:40 am

Hi all,
it my first time posting but a long time reader :)

does anyone knows how to add a second ADSR to the sh101?
its possible i'v seen it here :

thanks in advance,
Isak E.

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Solderman
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Re: SH101 second ADSR

Post by Solderman » Sun Aug 29, 2010 2:09 pm

I don't actually know the answer, but the envelope circuit in the 101 is made up of 6 transistors and a dual op-amp IC, among a few other discrete parts, and I'm not sure how you'd fit another circuit board inside for this. A CEM3310 with the correct integration into the circuit might also work, but would require a bit of engineering, not to mention building a small enough circuit board and actually locating the chip to begin with.

That said, if the extra envelope mod was actually published, I'd love to see it too!
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isak
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Re: SH101 second ADSR

Post by isak » Sun Aug 29, 2010 9:41 pm

thanks for the info Solderman :)

can u maybe guide me to do the triangle mod..?
this is what i did..
Image

can u tell me if did something wrong ? its not working.. :(

thanks again.

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Re: SH101 second ADSR

Post by Solderman » Sun Aug 29, 2010 11:22 pm

Make sure your 220k is connected to one of the outer pot terminals on one side, and R109-R112/C45 on the other. Pin 10 of the CEM3340 should go to the pot's center terminal. I can't remember if I grounded the pot's other outer terminal, but it likely is.
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--Solderman no more.

isak
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Re: SH101 second ADSR

Post by isak » Mon Aug 30, 2010 12:24 am

its working great thank you very much :)
Important note : its not suppose to be grounded, it suppose to get +5V !

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Re: SH101 second ADSR

Post by radek tymecki » Wed Sep 01, 2010 9:21 pm

left pin is G. resistor depends on max vol

Image

isak
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Re: SH101 second ADSR

Post by isak » Sat Nov 27, 2010 12:03 am

i think i found a way to add a second ADSR :)

what if i built an external ADSR? let say MFOS ADSR..? http://www.musicfromouterspace.com/anal ... SR001.html put it inside the sh101 and take the power supply from the sh101
Image
in addition a VCF cv in from the sh101 connect them together and that it.
then i will have 2 ADSR, one for the VCA and the new one for the VCF.

what do u guys say?

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Re: SH101 second ADSR

Post by steveman » Sat Nov 27, 2010 12:37 am

I think your biggest decision will be 'WTH do I put the controls' . Also the SH101 PSU may not be able to power the additional envelope

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Re: SH101 second ADSR

Post by rhino » Sat Nov 27, 2010 1:22 am

Not a second ADSR, but cool.
Do a search for nova-mod

Wait, here it is:

http://www.synthfool.com/docs/Roland/SH ... ovaMod.pdf
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