Is there a way to make external audio trigger the ADSR

Tips and techniques for Minimoog Analog Synthesizers
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Gladmarr
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Is there a way to make external audio trigger the ADSR

Post by Gladmarr » Fri Jul 17, 2015 3:14 pm

I've always thought it strange that the Voyager gate needs to be set to ON/EXT for external audio to come through without the envelope(s) closing. Why isn't there an envelope detector for the external audio to allow these external sources that have an envelope of their own (like a drum machine or voice) to trigger the filter envelope (for example)?

…or is it possible, and it's just one of those options on the Voyager that I haven't found yet?
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till
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Re: Is there a way to make external audio trigger the ADSR

Post by till » Sun Jul 19, 2015 5:47 am

This would need some additional hardware. It is not doable via software, as the audio in is not converted to the digital domain in the Voyager.
keep on turning these Moog knobs

Sequence:
Prodigy * minimoog '79 * Voyager * MF102 * MF103 * MF104z * MP201 * Taurus 3 * Minitaur * Sub Phatty * MF105 * Minimoog 2017+ MUSE * One 16

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Gladmarr
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Re: Is there a way to make external audio trigger the ADSR

Post by Gladmarr » Sun Jul 19, 2015 1:01 pm

That's what I was afraid of.
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TimeEchoProductions
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Re: Is there a way to make external audio trigger the ADSR

Post by TimeEchoProductions » Sun Jul 19, 2015 9:41 pm

You could keep an eye out for one of these.
http://www.rlmusic.co.uk/rlm3/korg-ms-0 ... processor/
Voyager XL, Minitaur, MF-101, MF-102, MF-103,
MF-105m, MF-107, MF-108m, MP-201
Thomas Monticello 371 with Moog preset Synthesizer

Sofine
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Re: Is there a way to make external audio trigger the ADSR

Post by Sofine » Mon Jul 20, 2015 5:03 am

Would the MF101 filter or MF107 freqbox get you some of the way there. They both have env out.

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GregAE
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Re: Is there a way to make external audio trigger the ADSR

Post by GregAE » Mon Jul 20, 2015 7:04 am

Well, there's this:
q118usage_1000.jpg

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MRNUTTY
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Re: Is there a way to make external audio trigger the ADSR

Post by MRNUTTY » Tue Jul 21, 2015 12:14 pm

All you really need is an amplifier to get the gain to 5V, a rectifier to remove the negative excursions, and a Cap & Resistor low pass to smooth out the original signal into some kind of envelope that would satisfy the kbd gate condition. Basically an envelope follower without a gate output. Add a one-shot and there's your gate!

But if it was me, and it will be sometime this year when I add a 5U rack :-), I'll just buy an envelop follower like GregAE posted.
VoyagerEB, Minitaur, LittlePhattyII, 4xSlimPhatty, Sub37, MF[2x101,2x102,103,104M,105,105B,105M,2x107,108M], 3xCP251, XV351, MP201;
System 55 and Minimoog clones, personally modified to bring them closer to OG spec(s).

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Gladmarr
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Re: Is there a way to make external audio trigger the ADSR

Post by Gladmarr » Wed Jul 22, 2015 2:28 pm

If you know how to build that, why would you buy something that is only going to cost more?
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MRNUTTY
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Re: Is there a way to make external audio trigger the ADSR

Post by MRNUTTY » Wed Jul 22, 2015 4:58 pm

I value my time more. I did hardware for 35 years, I'm retired :-)
VoyagerEB, Minitaur, LittlePhattyII, 4xSlimPhatty, Sub37, MF[2x101,2x102,103,104M,105,105B,105M,2x107,108M], 3xCP251, XV351, MP201;
System 55 and Minimoog clones, personally modified to bring them closer to OG spec(s).

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Gladmarr
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Re: Is there a way to make external audio trigger the ADSR

Post by Gladmarr » Wed Jul 22, 2015 7:59 pm

Fair enough.
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