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 LittleOne by Xhun Audio is a Virtual Instrument Audio Plugin. It functions as a VST Plugin.
Product LittleOne
Developer Xhun Audio
Price (MSRP) €45
Type / Tags
Plug-in, App & Soundware Format(s)
Operating System Availability
Download Released
 2.9  Downloads Released
System Requirements
PC Windows, 32-bit VST Host installed
Miscellaneous Information
Copy ProtectionKey File

LittleOne is a faithful software emulation of one of the most legendary and appreciated hardware analog synthesizers.

To produce a natural, deep and warm analog sound, every single component inside LittleOne (oscillators, filter, envelopes, LFO...) has been carefully modeled to mimic the inner behaviour of real hardware analog electronics components, their original frequency responses and their operative ranges.

In addition to this, LittleOne encloses a full rack with a 16-step analogue sequencer, a 16-step trancegate effect and two insert/master effects slots, making LittleOne a versatile and complete audio synthesis setup.


  • Analog Modeling simulation of real analogue hardware.
  • Full 64-bit accuracy for every aspect of the simulation.
  • An all-in-one complete synthesis setup.
  • Advanced Component Simulation (ACS) approach. Oscillators, Filters, LFOs (, ...) simulate the micro-instability and imperfections of the analogue technology. This feature brings richness, genuineness and depth to the sound.
  • Two aliasing-free Analog Modeled Oscillators featuring continuous selection mode (like the original) between Triangle, Saw, Square, Pulse and proving the same capacitors' charging/discharging responses as found on the original analogue circuits.
  • A 4-Pole resonant Low Pass filter modeled on the classic Ladder, featuring the original frequency responses, self-oscillation, authentic soft-clipping and overload control. The ladder filter has been modeled adopting the topology-preserving transform / zero-delay feedback approach.
  • Two 4-Stage (ADSR) Envelope Generators with exponential response, proving the same capacitors' charging/discharging responses as found on the original hardware.
  • Modulation LFO with the original waveforms and frequency ranges (0.2~500 Hz) including FM possibilities.
  • True analogue polyphony. In addition to a classic monophonic mode, polyphony (4-voices) is achieved by simulating four fully-independent synthesis systems (devices) separately, as expected in the original hardware specification extension. Each of the four independent voices (devices) can also be tuned/detuned separately for an even more deep and rich polyphonic sound.
  • Analogue components selector. Choose what kind of components to use inside LittleOne : select ultra-stable components, phase-locked oscillators (like in most recent analogue synthesizers) or select aged, much more unstable components and disable the phase-lock of the main oscillators.
  • 400+ ready-to-use factory presets covering all styles, from Vintage Analogue to FM, to contemporary cutting-edge Teckno/Trance to Psychoacoustic sounds and SFX.
  • XSQ16A, a build-in 16-step analogue sequencer.
  • GAT3D, a build-in 16-step trancegate effect.
  • Two insert/master effects slots with the possibility to choose between delay, reverb, tube distortion, flanger, chorus.
  • Full MIDI CC#s mapping (according to the original LP CC#s specs).
  • Supported Sample Rates from 44.1 to 192 kHz.
User Rated

Review LittleOne Now!

Discussion: Active


21 September 2013 at 7:45pmSendy

I have a few misgivings with this one. For a start, the waveform selection knob simply fades between waveforms. The Phatty morphs it's waveforms which is a much more interesting sound. Crossfading can be forgiven somewhat if there's still a way to do PWM, but the square simply crossfades into a very thin pulse? Are you kidding me?

The other gripe is the interface, which seems to be a copy of the Phatty again. So we have a pokey LCD menu to perform actions which should be on the GUI proper and multi-purpose knobs with buttons to change the knob's function. WHY NOT JUST PUT THE PARAMETER'S KNOB/VALUE WHERE THE MODE SWITCH FOR IT IS?! It's like the one thing that the Phatty is disliked for, multi-purpose knob sharing, has been faithfully reproduced. How a feature like that makes it into a softsynth is beyond me.

22 September 2013 at 1:23amRah

Valid criticisms Sendy, and I agree with you on the GUI, it's not the best.

I guess that the creator fell in love with their Phatty, warts and all, and wanted to create a (perhaps too) faithful tribute?

I'll have to check out the morphing on a real Phatty and compare. I don't tend to modulate the osc waveforms or use PWM sounds much myself, so I haven't found it terrifically upsetting.

22 September 2013 at 4:48pmSendy

Yeap, those two things are a dealbreaker for me, but other than that, it seemed pretty solid. Their guitar plugin sounds good so obviously they know what they're doing.

27 April 2017 at 12:16pmxhunaudio

Hi Sendy, .

The oscillator morphing engine (among everything else) has been re-written from the ground up. It is now capable of true PWM. Available soon in LittleOne version 3.0 .

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Average user rating of 9.00 from 1 review

Xhun Audio
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