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The coupling capacitor removes the high voltage DC offset from the output signal of the tube stage. This high-pass frequency is usually between 5-10 Hz, but if it is set higher then a user can change the tonal and dynamic properties of the stage.

The grid resistor value is an all-in-one resistor used to calculate the effects of the stage’s band­pass limitation. Inside each tube there is an internal capacitance called “Miller capacitance.” The greater the resistor, the lower the bandwidth. The bandwidth can be calculated at 1/(6.28*RC) where R is the “grid resistor” and C is the Miller capacitance (usually around 150pF). In a normal triode stage with a 12AX7 tube, the bandwidth is around 15 kHz if the grid resistor is 68 kOhm.

The slider for Class A/B is used for pentodes in push-pull configuration only. (The Bias voltage slider can be used as an alternative.) This sets the bias of the tube stage such that it corresponds more to a Class A or B stage.

Some of the non-physical tweaks:

Normally, a tube’s output swing is determined by the VPP, along with the various loads in the circuit­. Setting Clip Limit to something higher than 1.0 gives the circuit a greater dynamic range. The output gets higher and the distortion on one side decreases. Clip softness is used to smooth out the sharp dynamic edge and gives the distortion a smooth sound.

The default value of the Dynamic Bias offset amount is 1.0, and scaling this value changes the dynamics of the signal. The signal is usually not entirely free to move through the tube, and strong transients and high volumes affect the bias of the tube, moving up and down, as a function of volume.

Cathode biased treble boost (where applicable) changes the “filter effect” that the cathode resistor & capacitor has on the frequency response.

The Bias adjust slider simply adds or subtracts a certain voltage to or from the tube’s bias. Other- wise, this bias is defined by the tube and its surrounding components.

Extra input headroom gives the stage more dynamic headroom, making the tube distort later if given a greater headroom. For a triode this means the signal is “attenuated” before the input and “amplified” after the output, thus restoring the signal strength to the following tube.

The tube Tweak GUI features the following graphical displays: A “bode plot” (frequency& phase response) an oscilloscope (with input and output signal display overlaid) and “transfer function” (a snapshot of the static input-to-output relationship).

The whole tube component can be disabled via the Disable circuit checkbox.

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Intel ReValver MK III manual
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ReValver MK III specifications

The Intel ReValver MK III is an advanced modeling guitar amplifier software that has captivated musicians since its inception. With a blend of cutting-edge technology and an intuitive interface, it allows guitarists to create an endless range of tones, capturing the essence of classic and modern amplifiers with precision and fidelity.

One of the key features of the ReValver MK III is its extensive library of amplifier models. Users have access to a wide variety of iconic amplifiers from different eras, each modeled with meticulous attention to detail. This includes everything from vintage tube amps to high-gain modern monsters, providing musicians with a versatile toolkit for crafting their unique sound.

The technology behind ReValver MK III is revolutionary, utilizing a proprietary modeling technique known as "Instrument Modeling Technology." This approach captures not only the sound of the amplifiers but also the way they interact with different environments and speaker configurations. Musicians can select various cabinet simulations and microphones, allowing for realistic recording setups right from their computers. This feature is essential for guitarists wanting to achieve studio-quality tones without the need for physical gear.

Another standout characteristic is the pedalboard feature. ReValver MK III includes a comprehensive selection of effects pedals, allowing users to chain together distortion, delay, reverb, and more. This enables guitarists to replicate their favorite sounds from famous recordings or experiment with new ones. The flexibility to customize effects and order within the chain means that players can take full control over their sonic palette.

The user interface of ReValver MK III is designed to be both powerful and user-friendly. It offers a visual representation of the signal chain, making it easy to drag and drop components, tweak settings, and instantly hear the results. Additionally, the software supports various input methods, including MIDI controllers, ensuring that players can interact with the software in a way that suits their playing style.

ReValver MK III also stands out for its advanced performance capabilities. With low latency processing and high-quality audio output, it seamlessly integrates into both live performance and studio recording setups. The software is compatible with various digital audio workstations, making it a flexible choice for musicians.

In conclusion, the Intel ReValver MK III is a groundbreaking software solution that merges sophisticated modeling technology with practical user features. Its extensive range of amplifiers and effects, combined with a flexible interface and performance capabilities, make it an indispensable tool for guitarists seeking to expand their sound without the burden of traditional equipment. Whether you’re a seasoned professional or an aspiring musician, ReValver MK III promises to elevate your guitar playing experience.
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