I am happy with equal temperament 
fwiw, that - as you most likely know - is also an option on the Moog Subharmonicon.
It would be great if you could have options to use the AD with the sequencer, with a trigger button and not at all. I would love to have the option of just having the oscillators running as drones going through a filter.
It is fantastic that you are doing this 
Take care, stay safe
Phil
I’ve got a big button, that works like the play button on the real thing, it start/stops the clock/sequencers… a reset button and a tact controller for tempo… all of which I should have done on the patchstorage version.
I should be able to put a button in that switches off the AD env’s and a manual envelope trigger button as well. On the real unit, there is a button labelled EG, this locks the filter and envelopes to their highest values, is this what you mean ?
runcell
Out of curiousity regarding frequency division and how close we can get with subharmonics to actual notes, I made a quick spreadsheet. I started off with A = 440Hz and then upscaled from there. The top frequency in the chart is A8 = 7040Hz.
Take note of one close note, for example is when starting with A8, G5 from frequency division is 782.222. According to the chart provided by this link:
https://pages.mtu.edu/~suits/notefreqs.html
G5 = 783.99Hz, which is fairly close.
I like the discussions @sowarimodular and @Runcell.
The file:
https://drive.google.com/file/d/1HStbhkcyMGle7xNmVtqXVeDJx6luiJ0A/view?usp=sharing
Re: EG what it says in the manual - This includes being able to disengage the ADs - which is how I understand it - and have the oscillators just run through the filter for drone music techniques. Then there is als the Trigger button that can act as a gate when held or an AD if the finger is removed. But I do understand what you mean by highest value.
Hey @playinmyblues, the subs frequency division is not too hard to do, we can use the SUBMARINE SS212… the biggest problem is connecting several sources to one (frequency dial) and all the switching… for example there are 16 intervals on just one frequency dial, so we need x2, 8 way switches and a 2 way switch to switch between the 2, 8 way switches… now that is for just one frequency dial, so we need to do this another 5 times for each frequency dial, so that’s 12- 8 way switches and 6- 2 way switches (18 in total) to get the all the frequency dials in. If you see.
Hopefully I can find a way around that.
all the best
runcell
Hey @sowarimodular, I’ve got the manual trigger button working. The EG button is a 3 way switch, I’ve got the env on/off part working ok, I just have to figure out the third state, how to hold the envelopes open. Which is possible but needs an envelope with a cycle or hold cv in, so the current NYSTHI AD envs will have to be swapped out.
cheers
Here is little update, demo.
The patch is growing and I’ve not put the frequency dials in yet.
The Subharmonicon is more complex than it appears. Things like the rhythm dials are OR logic from value 0-63 and XOR logic from 64-127… the envelopes attack portion does not retrigger until the attack phase is complete and such. But and if the cpu holds out, it’s all recreatable.
This thread is epic!
Thanks to all of you! Great Job!
Cheers @jorhay1… I’m looking forward to getting the pitch dials patched in… haven’t had a chance to, over the last couple of days.
There is a version 1 on PatchStorage if you want to have a go with it.
take care
Great stuff!
@Runcell, @sawarimodular, @johay1, wow guys, you are really getting some stuff done. My Subharmonicon came a little earlier than expected so I have been playing with it, making my way through the manual.
I have to admit, I read very little of the manual before this. I was referencing the photo of the hardware interface when I needed to to help understand it.
Building the version in miRack and playing with the other versions really helped me in using the hardware version. One thing I did not understand much was how Sub 1 modulates the main oscillator when both the square and sawtooth waves are selected.
And I think it was already mentioned above, the VCF and VCA Attacks engage all the way until they finish before another trigger or gate restarts the envelope.
And I think Omri Cohen talks about link between Seq1 to Osc1 and Seq2 to Osc2 in his tutorial but I never really paid attention to that part when choosing which sequence to assign to which oscillator.
I am glad to see that other people are seeing this project and hopefully enjoying it.
Hey @playinmyblues, that’s good to hear… hope you’re enjoying those rich analog tones that Moog are so good at 
Yes, seq 1 to oscillator 1 (and 2 subs) and seq 2 to oscillator 2 (and it’s 2 subs). The switch88 is not really needed, something I’m just contemplating.
The pulse width mod occurs only when saw + square (middle switch position) is selected. There are no pwm controls that I’ve seen on there. So I believe that it is a set amount though I’m not sure yet if OSC 1 saw (subs) modulate OSC 1’s square wave or OSC 2’s square wave… something I need to look into.
There is a block diagram in the back of the manual, which may come in handy for things like pwm.
However, I think I like the idea of an on/off button and an amount dial for pwm, so I will probably put those in.
As with the envelope attack time, yes the attack will not allow another trigger until the attack phase has completed… I’ve played about with this… and kind of preferred it when that wasn’t active… but again I could use an extra 2 envelopes and put a switch in that toggles between the 2 (on of off).
Would be nice to get my hands on a Subharmonicon to hear the envs working, and the rhythm dials etc… I’ll post version 2 up soon, it may have some extra buttons and some bits are not 100% accurate, but would be interesting to see how close it can get.
Enjoy jamming’ out on your new Moog
All the best
runcell
Could you clarify what you mean by this? I don’t understand - cheers.
Agreed. But the ‘Polyrhythm’ selection to either/or sequencers is very important as we all agree.
Best
Phil
Hi @sowarimodular, removing the switch88 will not affect the gates to sequencers (polyrhythms).
The switch88 assigns pitch cv to the oscillators… ie- either sequencer to any oscillator. This of course is not how the hardware unit works, but is a useful addition. Hence why I’m still considering it.
The polyrhythms RATE dials are OR LOGIC gates from value 0 to 63 and then switch to XOR LOGIC from value 64 to 127… again I’ve played about with this, didn’t like it much, but will have another go at it.
Also some soft distortion when pushing up the vol.
I’ve got the pitch dials (tact cntrlrs) in for each oscillator, the intervals/divisions work really well… so well in fact, I’ve just been playing with it for the last day or two.
And just to clarify the pwm… when the wave selector/switch is in the middle position, the fundamental OSC is a square wave and the two subs are saw waves. There are no pwm controls on the front panel (that I’ve seen) so the pwm is a set amount that’s for sure…but is osc 1’s square wave modulated by osc 1’s own subs (saw waves) or osc 2’s subs/saw waves…? or both ? I can check it out on the (very useful) block diagram in the back of the manual…thanks Moog
edit- I’ve not had a good look at the block diagrams yet… little apprehensive as they will reveal just how complex this really is.!!.
hope that helps @sowarimodular, take care
runcell
Yes sorry, I understand that removing the ‘switch88 will not affect the gates to sequencers’.
It is great you are doing all this hard work
Best
Phil
Btw, @playinmyblues, @Runcell, @jorhay1 there is a new ‘complete’ Subharmonicon for VCV Rack: https://slimechildaudio.com/substation/
There are even manuals for it. It is a paid for set of modules but at the moment, just $10. I have purchased!
This is SO GOOD, here is a short demo: https://youtu.be/551iLRObPMc
Best
Phil
@sowarimodular page 19 of the Subharmonicon manual (https://back.moogmusic.com/sites/default/files/2020-05/Subharmonicon_Manual.pdf)
“MIDDLE: The middle position is a special case. With the switch in this position, SUB 1 and SUB 2 will both output sawtooth waves. However, VCO 1 will output a square (pulse) wave. By default, the sawtooth output of SUB 1 is normalled for use as a PWM (Pulse Width Modulation) source for the square wave of VCO 1. PWM can change the width of the pulse wave, altering its timbre which is popular for creating string-type sounds.”
I am thinking about what this means as I write it. Normalled means that the waveform is altered so that it has values between 0 and 1. This is instead of the regular range of frequencies it usually has. This value is used to modulate the VCO1 (now) pulse waveform (between 0 to 1 or 0% to 100% duty cycle - this is probably more likely 5% to 95%. Or maybe it is between 50% to 95%. I have not hooked up an oscilloscope to check.)
I cannot see where it references the Sub 2 waveform at this setting.
Hey @sowarimodular, that looks cool… kind of makes me want to get VCV. I have 2 PC’s - one is for my field recordings/sound editing and off line, the other is used in my studio, but needs a serious clean up due to it being on line and takes about 10 min just to turn on.
I noticed there are 3 sequencers on there interesting… they have the quantize section, with extras - diatonic + chromatic…nice.
There is a switch for the gate to seq LOGIC on there and It’s one or the other by looks of it… it can be both on the hardware -gate1 OR. gate2 XOR. gate3 OR…etc. No problem though, at least it can switch between logic gates, even if it’s all of them together.
And I notice there is only one oscillator (with 2 subs)… or is there a switch for osc2.?.
Glad you’ve found the sound you’re lookin’ for…enjoy .
will post up a demo of where I’m at and the pitch dials, can get some nice chords going on it
catch you soon
runcell
Hey @playinmyblues, that is exactly the info I need regarding pwm. Sub1 is the mod source for osc1. I would assume the same is true for osc2 - sub1 is the mod source. That makes sense.
The ‘normalled’ you mention is to do with a type of connection, like on a patchbay - you have normalled and half normalled connections… basically it’s like a split that doesn’t break the normal connection.
all best
runcell
