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XAOC Devices Sofia

¥76,900 (Tax excluded ¥ 69,909)
Analog oscillator with a wide sound palette with a unique waveform generation method

Format: Eurorack
Width: 24HP
Depth: 30mm
Current: 90mA @ + 12V, 80mA @ -12V

Manual Pdf (English)


Sofia is a special analog oscillator based on a unique waveform generation principle.With a triangular oscillator core and two elaborate wave shaping and modulation sections, Sofia's sound is a warm, saturated fundamental and tworipple componentis synthesized by

Voice synthesis by Rippleformant synthesisis a kind ofIn this method, by controlling the ripple parameter triggered by the oscillator core in the time domain rather than the frequency domain, it is possible to produce timbral change characteristics close to those of acoustic instruments when the pitch changes.

In addition to the main output signal, Sofia offers a wide range of modulation inputs that allow access to the individual components of the sound, as well as extremely flexible self-patching and animation of the output waveform.The range of sounds that can be created is surprisingly vast and is not limited to any particular kind, from tearing hard-sync effects to wooden percussion to warm, fuzzy, glowing, sine-wave-like evolving sounds. Hmm.


Sofia working principle

Sofia implements and extends a classical computer music technique used to synthesize formant sounds called FOF (fonction d'onde formantique).This is a simple time domain component (sine wave attenuation: hereRipple) are used to achieve the desired spectral characteristics.

Sofia adds two series of ripples to the fundamental.A new pair of ripple elements is created each time the fundamental tone cycles, and the density and decay rate of these ripples can be adjusted over a wide range.It is also possible to distort (warp) each element in such a way as to speed up or slow down the density of these elements in the cycle, switching the fundamental waveforms of each between sine and square waveforms for even richer You can also get sound.

The generated signal appears to have a spread of frequencies, but all elements are waveforms shaped from the core and are in phase, so they are in exact harmony.



The explanation of each part is displayed by mouse over

About FOF Synthesis

The classical FOF synthesis technique was proposed by X. Robet in the 1980s for the effective time-domain synthesis of vocal-like formants without resorting to expensive digital filter implementations at the time. accomplished the synthesis. Robet saw the possibility of decomposing the complex response of the vocal tract into parallel acoustic resonant filters that produced sinusoidal tones (ripples) that decayed in response to each pulse of air pressure from the larynx. .There is a direct relationship between the density and decay rate of the decaying sinusoid, the frequency position of the formants and the spectral width.

Modulation and self-patching

Alone, Sofia can synthesize a wide range of acoustic, wooden, organic, or animal-like sounds, up to high, fuzzy, bright sounds, but animated via multiple CV inputs. By adapting it, you can maximize its potential. Add a whole new dimension to your sound by patching complex modulation signals, like the Xaoc Devices Zadar envelope, audio signal, or white noise to various parameter modulations.And by experimenting with self-patching using inputs between two elements from Sofia's individual outputs, the sound reaches uncharted territory.