emthree mini synthy

[Mark Hammer]

Thanks for the link.  So, pretty much like any other f/2 - f/4 octave divider box, complete with all the expected glitchiness during the decay.  I'm beginning to think that these things need, if not companding, then at least some sort of squelch control, maybe a couple of LEDs in series with the audio path so that there is no accidental triggering.

[armdnrdy]

Yeah...I wasn't very impressed with the tracking.
I built a Pearl Octaver that seems to track better than that.....but using a more complicated circuit.

[DiscoFreq]

one more hen's tooth? how cool is that? and disco_freq HAS one...

I bought a lot of octavers for a while (shortly after my "filter" period), so I have a few other "hen's teeth" (all rather cheap though, no Mu-Tron Octaver or things like that), including this other old Italian:

Tekson Color Sound

No demo, but there's a related effect (with 1 more octave) that has a video:

Sonextone Multividers envelope)

[digi2t]

one more hen's tooth? how cool is that? and disco_freq HAS one...

I bought a lot of octavers for a while (shortly after my "filter" period), so I have a few other "hen's teeth" (all rather cheap though, no Mu-Tron Octaver or things like that), including this other old Italian:

Tekson Color Sound

No demo, but there's a related effect (with 1 more octave) that has a video:

Sonextone Multividers envelope)

HOLY SNORKERS!!!!! Bestill my thumping heart!

If ever you want them traced, I`m your man.

[Mark Hammer]

But are they polyphonic?   

[DiscoFreq]

If ever you want them traced, I`m your man.

Let me know after NAMM, then I should have more time (also for a few things Analogguru asked...).

Some other rare octavers:

Conn model 914 Multi-Vider


DOD 535-A Octoplus
(the rarest DOD pedal AFAIK )

And not an octaver, but it has octaves ;-)

Jen GS-3000 Syntar

[Mark Hammer]

Hmmm, you know what that Syntar reminds me of, eh, Dino?     Except that it would appear to use some form of pitch tracking (probably a 4046 per string, I would imagine)  That looks sweet.

[nocentelli]

A very crude, but pleasingly simple version of this type of  synthy/fuzzy octave down can be found in the Dwaftcraft "Robot Devil": Just 2 4049 inverters in series feeding pin 10 of a 4040, three output pots off pin 10 (straight fuzz), pin 7 and pin 9 for one and two octaves below.

[digi2t]

Hmmm, you know what that Syntar reminds me of, eh, Dino?    Except that it would appear to use some form of pitch tracking (probably a 4046 per string, I would imagine)  That looks sweet.

Yup. I actually thought when you first spoke to me about the Trioct, that this was what you were talking about. That JEN has alway intrigued me though. The schem's are available on the net too.

If ever you want them traced, I`m your man.

Let me know after NAMM, then I should have more time (also for a few things Analogguru asked...).

Just say the word, and my bench is cleared. 

[Mark Hammer]

Yup. I actually thought when you first spoke to me about the Trioct, that this was what you were talking about. That JEN has alway intrigued me though. The schem's are available on the net too.

Found!  http://s456592474.website-start.de/app/download/9258589/JEN-Syntar-Schemas.pdf  And, to my surprise, not a 4046 to be found anywhere!

[pinkjimiphoton]

holy @#$%, if someone burns any boards for these, let me know please!!!

nice find there mr hammer!!

too epic for vero.. ?

lol

[Mark Hammer]

Too epic for vero?

Interesting question.  A hex version, probably.  A mono version, possibly.  The tempting part of this is most definitely the diode ladder filter - essentially a Minimoog-type 4-pole lowpass.  Trust me, every player needs one of these.

[armdnrdy]

With only a quick glance...what is module A, B, and C?

[pinkjimiphoton]

that would be pretty awesome.

i still have a minimoog waiting to hit my bench... it "faded out" over time after going thru a flood, only the noise osc is still working... this pedal has a moog style filter? that could be extremely sweet
on a guitar.

one of the things i used to love about the 70's was seeing peeps like rick wakeman.... them analog filter sweeps at 120db were amazingly...umm... organic...

i think that's what i always tried to emulate on guitars (when not playing blues)...that kinda crAWWWWWWWWZZZZOOOOOOOOOOOOEEEEEEEEEEEEEEEEEEEEEAHHHHHHHHZZZZZZZZzzzzzzzzzzz kinda sound.

lazer beams on smoke. take that however it fits best with one's personal ideologies; i remember bits and pieces of the 70's had some interesting... things to not try at home, as we were highly skilled paid professionals yada yada..

but would love to be able to make something that would be simple, and vero-able... mono would be fine. but... if it were simple enough, i'm wondering if 6 could be crammed into a box with maybe a piezo bridge as a driver.. i have a schaller bridge with 6 individual piezos (tom) they just have all the pickups summed together to two terminals.

a diy analog guitar synth, just something basic, but polyphonic would be something absolutely ridiculous. i mean i would wanna try and go for it. i don't think my chops are up to snuff yet tho to try and vero something that extensive.. it seems like perf would be the easier way to go with something like that maybe.

but...  adsr i think could all be driven by maybe a couple 4069 fuzzes or something from each string, then need vca vcf and lfo... would it need that for each string, or could the 6 strings be summed into a mixer stage before the envelope/amplitude/filter/lfo. i realize mono is a lot easier.... just betting the tracking is gonna be tough after messing with various roland multi effect "guitar synth" patches and my gr1/09/30.

i'm imagining it would be quite an epic task.

soon as i get done fixing my shin ei fuzzwah i'm gonna mess around with my breadboard and try and make some bleeps or something, i bought a bunch of chips yesterday to play with.

i'll try starting with the mini synth circuit today at some point... gotta get ready for the "storm" <gasp>

[Mark Hammer]

Actually, now that I look a little more closely, I gather the unit IS mono, and provides for pitch-to-voltage conversion for each of the strings individually, utilizing some sort of priority system to direct the output to the remainder of the sections.

Quite possible that modules A, B,and C are the three boards one sees in the very middle here:  http://www.sequencer.de/pix/siel_crumar_elka/syntar_innen.JPG

It would seem this was intended to be a serious gigging machine, though, since it has tempco resistors in the VCO sections for pitch stability

I wouldn't kick one of these out of bed, that's for sure.

[PRR]

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