Diva Oscillators Explained: Triple VCO, Dual VCO, Eco, DCO and Digital

Diva gives you five oscillator models, and most people pick one at random, load a saw and move on. That works, but the Diva oscillator models sound and behave very differently, and choosing the right one before you touch the filter saves a lot of time. After this post you'll know what each model does, which controls matter, how much CPU it costs and which one I reach for when I build basses, pads, leads and stabs for melodic house and techno.

The five Diva oscillator models at a glance

Open the oscillator slot menu in u-he Diva and you get Triple VCO, Dual VCO, Dual VCO Eco, DCO and Digital. Only one oscillator module is active per patch, so this is the first real decision in any sound.

A quick note on hardware: u-he never names the original synths in the Diva manual. It talks about "classic hardware" and, for one envelope, "another famous but unnamed analogue synthesizer". The names in the table are what reviewers and the u-he user community generally link each model to. Treat them as a guide to the character, not as an official spec.

Model	Commonly linked to	Character	CPU
Triple VCO	Moog Minimoog Model D	Three oscillators, fat, loose, great for mono parts	Highest
Dual VCO	Roland Jupiter 8 and Jupiter 6	Two oscillators, mixable waveforms, classic poly sound	Medium
Dual VCO Eco	A simpler older design, often said to be the Korg MS20	Basic, raw, no PWM or FM	Lowest
DCO	Roland Juno family (Juno 106 and Alpha Juno are both named)	One oscillator plus sub and noise, bright and stable	Medium
Digital	Roland JP8000	Supersaw and other digital modes, aliasing included on purpose	Medium

Triple VCO: the big mono workhorse

Triple VCO is the one that stretches across two panels, and the manual openly calls it the most CPU hungry oscillator model. You get three oscillators, each with an octave switch from 32' down to 2'. Oscillators 2 and 3 have a Detune knob that behaves like a five turn pot, so it can travel more than a semitone and even flip the octave if you keep turning.

The controls that matter

• Waveform: continuously variable, from ramp through triangle and sawtooth to square, then narrower pulses. The manual says to set it to 8.00 (a 25% pulse) if you want the maximum range for pulse width modulation.
• Sync: hard sync for oscillators 2 and 3, both locked to oscillator 1. Sweep the pitch of oscillator 2 with an envelope for the classic tearing sync lead.
• FM: oscillator 1 frequency modulates oscillators 2 and 3 equally. Small amounts add grit, bigger amounts go metallic fast.
• Mixer: a level for each oscillator, plus noise with a Pink or White switch. Pink is mostly low frequencies, White is full range.
• Feedback: takes signal from behind the filter and feeds it back into the mixer. The manual describes it as a subtle bass boost that can also give you subharmonics. On basses this knob is gold.

I use Triple VCO for mono basses and leads where I want weight and a bit of instability. Two saws a few cents apart plus a third oscillator one octave down (at 32' if the others sit at 16') gives you a full, moving bass in seconds. It works polyphonically too, but big chords with Triple VCO on the best accuracy setting will cost you, so read the u-he Diva CPU guide before you stack pads with it.

Dual VCO: the classic poly sound

Dual VCO is simpler than Triple VCO, but it has two things Triple VCO doesn't: independent (split) pitch control and several waveforms per oscillator that you can switch on together. VCO1 offers triangle, saw, pulse/PWM and noise. VCO2 adds a sine. A Mix knob balances the two.

• PW and PWM: one fader sets the pulse width from very narrow through 50% to 100%, which is silence. The second sets the PWM depth, fed by LFO2 by default. Slow PWM on a pad is instant movement.
• Sync: VCO2 syncs to VCO1, so set VCO2 higher in pitch to hear it.
• Cross Mod: similar to the FM in Triple VCO, but the amount can be modulated directly. Put an envelope on it and you get a bright, hard attack that settles down.
• Pitch mod switch: 1, BOTH, 2 or SPLIT decides which oscillator the pitch modulation hits.
• Shape revisions: ideal, analog1 and analog2. The manual describes ideal as the sweetest triangle, analog1 as looking like a sine but sounding more like a triangle, and analog2 as brighter, with a "tooth".

This is my default for chords, warm pads, brass stabs and sync leads. It sits nicely in a mix without much EQ.

Dual VCO Eco: when you need something cheap and raw

The manual is refreshingly honest here: Eco is fairly primitive because it emulates primitive hardware. There's no PWM and no FM, but it has the lowest CPU hit of all the models. Both Tune Mod sources (ENV2 and LFO2 by default) move the overall pitch, and a Ring option replaces the normal VCO2 output with ring modulation between the chosen VCO1 wave and the VCO2 square. That ring setting is great for bell like techno stabs and clangy percussion. I also use Eco for background layers that don't need to be perfect, which leaves CPU for the lead.

DCO: bright, stable and very Juno

DCO is a single oscillator model with a sub oscillator and noise. The manual says it delivers a more complex, brighter sound than the other analogue types. You build the tone from four sources: Pulse, Sawtooth, Suboscillator and Noise, and each of the first three has a shape selector. The straight line in each selector means off, and the fourth option from the top is the one that reacts to pulse width.

The sub oscillator is the interesting bit. It has six waveforms, all based on pulse waves. The top four sit one octave below the main oscillator, the last two sit two octaves down. Two faders on the right set the sub and noise levels.

Because the pitch is so steady, DCO is my pick for chord stabs, plucks and tight rolling basses where tuning has to be dead on against the kick. A saw plus a one octave sub, through a low pass filter with a short envelope, is a classic house bass on its own.

Digital: the supersaw and friends

The manual describes this model as emulating a well loved but unashamedly digital sounding oscillator, including all the dirt and aliasing of the original. The multisaw mode (seven stacked saws) is why most people link it to the JP8000 supersaw. It has seven modes in total:

• Multisaw: seven saws. Detune sets the spread, Multi sets the balance between the original saw and the detuned ones.
• TriWrap: a wrapped triangle. Wrap sets the threshold, Bend the symmetry. Nice for hollow, glassy leads.
• Noise: digital white noise through a resonant low pass. Tune is the cutoff, Q the resonance.
• Feedback: a saw through a short delay with feedback, so you get a comb filter effect. Great for metallic plucks.
• Pulse: a square and pulse mix with PW, plus Spike Up, which turns the wave into a saw and keeps pushing it.
• Sawtooth and Triangle: each with a synced sine on top, controlled by Harmonics and Bend.

Oscillator 2 can be tuned up to 30 semitones up or down, and you get Sync, Cross (FM from oscillator 1) and Ring. There is also a High Quality button that reduces aliasing, usually at a small CPU cost. I leave it off when I want the gritty trance character and switch it on for high leads where the aliasing starts to whistle.

How I pick a Diva oscillator model for a part

This is the quick decision process I use when building sounds for melodic house and techno:

1. Mono bass or lead with weight: Triple VCO. Use Feedback for low end and keep the third oscillator an octave down.
2. Tight bass that has to lock with the kick: DCO with the sub, or Triple VCO with Transient Mode set to osc reset so every note starts the same way.
3. Warm chords and pads: Dual VCO with slow PWM.
4. Stabs, bells and metallic hits: Dual VCO Eco with Ring, or Digital in Feedback mode.
5. Wide trance or progressive leads: Digital in Multisaw.
6. Lots of background layers: Dual VCO Eco to keep the CPU low.

If you want to see these choices in context, I break down a full bass patch in how to make melodic techno bass in u-he Diva, and the wider workflow in how to use u-he Diva properly.

Common mistakes with Diva oscillators

Judging the sound on draft accuracy

The manual says FM sounds rough on draft and resonance is primitive. If you design an FM or cross mod patch on draft, it will sound different once you switch to great or divine. Pick your accuracy first, then design.

Turning the Trimmers up too far

The Trimmers panel has per voice oscillator detune, Detune Amt and Voice Drift. The manual literally says to keep Detune Amt and Voice Drift low for good tuning. A little adds life. A lot makes chords sound out of tune, especially on DCO sounds where people expect stability.

Forgetting Transient Mode on basses

By default Diva behaves like an old analogue synth and resets nothing when a note starts, so every bass note hits a little differently. That's charming on pads and annoying on a bass that has to punch through the same way every bar. Set Transient Mode to osc reset in the Trimmers and use the Reset Phase knobs.

Stacking the most expensive oscillator

The manual warns that stacking will eat up CPU. Stack 4 on a Triple VCO chord is three oscillators times four voices times every note you hold. If you want width, try the Digital Multisaw or the StackIndex dual filter trick with only two stacked voices.

FAQ

Which Diva oscillator is best for bass?

Triple VCO for fat mono basses with movement, DCO with the sub oscillator for tight, stable basses. Both work well for melodic techno. Keep the patch mono (no stereo chorus) below roughly 100 Hz.

Does u-he say which hardware Diva models?

No. The manual refers to classic hardware without naming it. The Minimoog, Jupiter, Juno and JP8000 comparisons come from reviewers and users, and they match the character of each model well.

Which Diva oscillator uses the least CPU?

Dual VCO Eco has the lowest CPU hit according to u-he. Triple VCO has the highest.

Can I use two oscillator models in one Diva patch?

Not in one instance: you choose one oscillator module per patch. If you need both, layer two Diva instances or bounce one part to audio.

Is the Digital oscillator useful for house and techno?

Yes. Multisaw is great for big progressive leads, and the Feedback and TriWrap modes give you metallic and glassy tones that the analogue models can't do.

The fastest way to learn these models is to open finished presets and look at the oscillator slot first. Start with the free Glow Diva presets, and when you want a full library across all five models, the Complete u-he Diva Preset Bundle has 480+ sounds for melodic house, progressive house and melodic techno.