Kernom was created by musicians and engineers who spent years using guitar gear.

Like many players, we always felt there was a compromise.

Analog gear often sounds incredible. It reacts naturally to playing dynamics and produces the complex nonlinear behavior that musicians love. But analog circuits are usually fixed. Their sound is determined by the topology and the component values. If you want a different behavior, you typically need a different circuit.

Digital gear offers the opposite. It is flexible, configurable and capable of doing many things in a single device. But when nonlinear behavior has to be recreated numerically, it becomes an approximation of the original electrical phenomenon.

Then, as engineers, we decided to go beyond existing circuits to find a solution. Instead,
we started from a blank page and asked a different question:

How can we keep the real nonlinear behavior of analog electronics while making it flexible like a digital system?

Real diodes and transistors naturally produce the nonlinear transfer curves that define many musical sounds. These components are extremely simple and inexpensive, but their electrical behavior is complex and expressive. Using them directly in the signal path ensures that the nonlinearities are generated physically, not approximated.

The challenge is that traditional analog circuits do not easily change their behavior.

The key observation is that the behavior of these components depends strongly on their biasing conditions. By controlling their operating point, it becomes possible to modify how they clip, compress and generate harmonics.

This idea became the foundation of the architecture.

Instead of emulating nonlinear circuits with DSP, the system uses real analog components to generate the sound, while digital systems precisely control their operating conditions and perform the tasks that digital processing handles best.

From this approach emerged the Analog Morphing Core: a circuit architecture that allows real analog nonlinear stages to continuously change their behavior.

The goal was never to imitate the past, but to create a new way for analog circuits to behave.

The Analog Morphing Core is the architecture at the center of Kernom products. It combines analog nonlinear sound generation with digital control and processing.

In technical terms, the system could be described as a hybrid analog-digital architecture. However, we intentionally avoid presenting it that way. In the past, the term hybrid was often used to describe designs where a small analog section was combined with digital stages that largely defined the sound. Some early implementations, such as certain amplifier designs from the 1990s, gave the term a reputation that does not accurately represent modern architectures.

In the Analog Morphing Core, the role of each domain is clearly defined.

Analog domain: nonlinear sound generation defining the sound

The audio signal first passes through analog stages that contain real diodes and transistors. These components generate the nonlinear behavior responsible for clipping, saturation, compression and harmonic content.

Because these nonlinearities are created by physical semiconductor devices, their behavior is governed by their electrical transfer characteristics rather than numerical approximations.

The operating point of these components is digitally controlled, allowing their bias conditions to change in real time. By adjusting these parameters, the circuit can modify the nonlinear response of the stage while the signal remains in the analog domain.

Digital domain: control and linear processing

At specific points in the architecture, the signal is converted through analog-to-digital and digital-to-analog conversion. This allows the system to perform tasks that are better suited to digital processing.

These operations include:

• frequency filtering
  
• signal analysis
  
• parameter control
  
• preset management
  

This choice is based on a simple fact: linear processing can be done in either the analog or digital domain without changing the harmonic content or tonal character created by the nonlinear analog stages.

In other words, for operations such as frequency equalization, there is no inherent sonic advantage in keeping them analog if the goal is to preserve the character generated by the nonlinear circuit.

Implementing these functions digitally makes it possible to build more complex and precise processing sections, achieving better sound dynamics while also reducing circuit size, lowering component count and improving repeatability.

A controlled interaction between both domains

The Analog Morphing Core therefore separates the signal processing tasks into two complementary domains:

• Analog electronics generate the nonlinear behavior that defines the sound
  
• Digital systems provide control, analysis and flexible linear processing

By combining these two domains in a controlled architecture, the system allows real analog circuits to operate under dynamically adjustable conditions while maintaining the advantages of digital flexibility.

One of the main advantages of the Analog Morphing Core is that it allows a wide range of circuit behaviors to be controlled from a very simple interface.

In our products, this capability is exposed through the MOOD control.

Rather than switching between multiple circuits or modes, the MOOD knob continuously modifies the internal operating conditions of the system. Turning this control changes how the analog nonlinear stages behave, while the digital control system adjusts the parameters that shape the overall response.

Under the hood, several elements of the architecture evolve together:

• the bias conditions of the diodes and transistors that generate the nonlinear behavior
  
• the shape of the transfer curve that defines clipping and compression
  
• the balance of harmonic content produced by the analog stage
  
• the linear filtering and equalization used to maintain a coherent tonal response across the range
  

Because these parameters are coordinated internally, the user does not need to manage multiple technical controls to explore different circuit behaviors. The system continuously adapts the internal structure of the circuit while preserving stability and musical consistency.

From the user's perspective, this results in a control that can move through a wide spectrum of tonal responses without requiring complex menus, circuit switching, or multiple gain stages.

The goal is not to expose every internal parameter, but to allow the architecture to translate a single intuitive control into a coherent transformation of the circuit’s behavior.

The Analog Morphing Core therefore makes it possible to combine:

• a simple and immediate user interface
  
• a large range of tonal behaviors
  
• continuous transitions between different circuit responses
  

while the underlying analog and digital systems manage the complexity required to produce those changes.

No menus. No scrolling. No presets to navigate.

Just one knob that moves continuously through an entire family of sounds — from clean boost to high-gain monster, from vintage fuzz to ring-mod chaos, from tremolo to vibe. The transition is smooth, the response is immediate, and every point on the knob sounds great.

The diagram below shows how the signal moves through the Analog Morphing Core.

The nonlinear stages — where clipping, saturation and harmonic content are generated — remain fully analog, using real diodes and transistors.

At specific points, the signal passes through A/D and D/A conversion so that linear processing such as equalization and signal analysis can be handled digitally.

The digital system is also used to control the analog section, adjusting parameters such as the bias of the nonlinear components and other circuit conditions that define their behavior.

This architecture keeps the sound generation analog, while digital processing provides control, flexibility and efficient implementation of linear processing.