First patch with the AtoVproject Dual Harmonic Oscillator

This is a rich, complex-sounding patch based around the Dual Harmonic Oscillator from AtoVproject. It’s a big, super-powerful module with two triangle-based VCOs that offer four octaves worth of harmonics, as well as regular sine, saw and pulse outputs via the expander. I’ll be covering it in more detail in a dedicated video soon, but in the meantime check out DivKid’s excellent deep dive if you want to know more about it: • A Exciting & Unique ta...
In this patch, it produces four melodic layers, with everything driven from a simple 8-step sequence out of the Jasmine & Olive Trees Traffic module switched over to the Water firmware. Joranalogue Filter 8 provides some quadrature LFO modulation to control the levels of the harmonics, and ALM Pamela’s Pro Workout provides clock, trigger patterns and transpose voltages. I’m also using the Nekyia Circuits Obsidian for some extra LFOs, and the Sosumi LPG on two voices - full video coming soon on all the Nekyia stuff, it’s great! Reverb is Valhalla Supermassive (in the box).
More on the DHO: atovproject.de/products/dho
Buy from Signal Sounds:
www.signalsounds.com/atov-pro...
www.signalsounds.com/atov-pro...
More stuff from me:
tomchurchill.bandcamp.com/
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Chapters:
00:00 Jam
02:35 Intro
04:55 Patching harmonic level CV
06:21 Pitch sequencing with Water
07:34 Folded sine layer
08:59 Pulse layer
10:42 Bringing it all together

[@josh_dick]

This is as clever as it is lovely, fantastic walkthrough!

[@MikkelGrumBovin]

Beautiful , Tom ,-

[@jamalyannicguzmansierra7996]

Amazing patch man! In detail very simple, in harmonics very complex! This patch is amazing. Very easy to follow. The one thing i don't understand is the sequencing of the fold. Is it from pamelas or from waters? Thx and best regards

[@TomChurchill]

Thanks! So all the pitch sequencing is from Water. The first output of Water is quantised and sent to DHO voice 1, which gives one ‘harmonic triangles’ layer plus I’m taking its sine, which runs through the folder and LPG. The second Water output (which is just a copy of the same sequence 3 steps out of phase) goes to DHO voice 2, which gives the other ‘harmonic triangles’ layer plus I’m taking its pulse, which goes to the other LPG.
The *rhythm* sequences for the sine and pulse voices (i.e. the triggers that feed the envelopes that open the two LPGs) come from two channels Pam’s Pro. Hope that makes sense!

[@vampiresforesl]

Can you explain how you got 4 melodic layers without 4 volt-oct inputs? Thanks.

[@TomChurchill]

There are two oscillators in the DHO, and each has several outputs. So the four layers are the triangle harmonic mix from VCO1, the triangle harmonic mix from VCO2, the sine output of VCO1 (through the wavefolder) and the pulse output of VCO 2. The levels of the first two layers are controlled by LFOs modulating the internal VCAs; the sine and pulse each go through an LPG opened by envelopes. There are only two pitch sequences, going to the two V/oct inputs, but each one is effectively driving two layers. I walk through all this in more detail in the video 😉

[@MikkelGrumBovin]

He just did,-

[@LeonardoP]

Can you explain to me a little bit more slower how you're doing the pitch transposition? I understand that all sounds are coming from the same VCO, so I guess you're putting that slow modulation from pams to change the root pitch of the VCO, is that it?
Are you mixing it with other pitch modulations for the full transposing effect? I understand that the first section of melodies you're doing from modulating the cv inputs in each of the octaves of the 2 vcos. Are the other 2 melodies both coming from Water?
Sorry if what I typed is hard to understand, I'm just trying to follow my train of thought while trying to understand it, and its messy hahaha

[@TomChurchill]

No problem, I'll try to explain what's going on:
Water's output 1 goes through a quantiser and into one input of a precision adder. A slow (/32) square from Pam's, set to 12% level and also quantised (so the voltage is equivalent to exactly 7 semitones), goes into the other input of the adder. The output of the adder goes into V/oct of VCO 1 in the Dual Harmonic Oscillator. So this is basically getting the sequence from Water, which (thanks to Pam's) is transposed up 7 semitones for 4 bars out of 8.
VCO 1 in the DHO is then providing two 'layers' - the first is the mix of the four triangle harmonics in the main unit. These all follow the pitch received at the V/oct input but are one octave apart, and they're having their levels independently controlled by 4 of the 8 LFOs coming out of Filter 8 (patched to the internal VCAs on the DHO), so they fade in and out in order, but their timing isn't synced to the main clock/sequencer. This gives the kind of rippling octave effect that makes a basic melody sound much more complex ;)
The other layer provided by VCO 1 is the sine wave that's available via the DHO expander. This passes through a wavefolder and LPG and plays the very simple underlying sequence that you hear right at the start of the video.
Then I'm taking output 2 from Water, which is basically the same sequence but 3 steps out of phase with output 1. That runs through a separate quantiser and precision adder, where the same channel of Pam's is used to transpose it in the same way, and into VCO 2 in the DHO, which is also tuned up a fifth from VCO 1.
VCO 2 also provides two layers - another layer of rippling octave harmonics with the levels controlled by the other 4 LFOs from Filter 8 patched to the internal VCAs; plus the pulse wave from the expander which runs through an LPG that's triggered using a Euclidean pattern.
The key things here are the two phased copies of the same sequence that are provided by Water; tuning the two VCOs inside the DHO so that they're 7 semitones apart; the transposing by 7 semitones for 4 bars out of every 8, provided by Pam's, and the use of Filter 8 as a free-running LFO with 8 phase-related outputs that control the levels of the 2 sets of 4 octave harmonics in the DHO.

[@LeonardoP]

@@TomChurchill Nice, got it now! Thanks a lot!!!

[@nodz007]

you are a good man :) Thanks @@TomChurchill

[@AboveTheTrees00]

Damn I just bought Verbos harmonic oscillator. It seems to me I could have spent my money better.😢

[@russ254]

the grass is always greener in the other pasture