Modeling the amplifier (also known as amp modeling or emulation amp) is a process of emulating a physical amplifier such as a guitar amplifier. Modeling amplifiers often attempt to recreate the sound of one or more particular models of vacuum tube amplifiers and sometimes also solid state amplifiers.
Video Amplifier modeling
Analog vs digital devices, DAW add-on software
Signal processing in modeling concepts can be realized with analog or digital circuits, or a combination of both. Modeling digital amplifiers may appear as software, such as plugins for DAW (Digital Audio Workstation) that may be assisted by a computer hardware accelerator, or can be part of a standalone device or amplifier.
As part of a digital audio workstation, amplifier modeling can be applied "after the fact", to the guitar signal recorded "clean", to achieve the sound of the amplifier used. This process has the advantage of being dynamic - the amplifier settings can be adjusted without forcing musicians to re-record the part.
Today many analog modeling circuits may have digitally controlled interfaces, and analog signal paths in those units are often "redirected" and reconfigured with the aid of digital logic and semiconductor-based switching circuits. In addition, many "digital" modeling devices using DSPs can also use analogue modeling circuits.
Maps Amplifier modeling
Device modeling type
- Digital amp modeler
- Stand-alone modeling tools such as Line 6 POD (1998-) digitize input signals and use DSPs, special microprocessors, to process signals with digital calculations, trying to achieve the sound of expensive, expensive, professional amplifiers. expensive and more compact devices. This modeler can be connected directly to a recording device or PA system without having to use the power parts, speaker cabinets and microphone; However, there is an ongoing debate over the question of how accurately a modeler can create a real amplifier sound. Most modelers generally also incorporate separate effects from emulation amps and some can be connected via USB for computer-based recording.
- Digital modeling amplifier
- Modeling amps like Peavey Vypyr, Roland Cube, Fender Mustang, and Line 6's Spider series are amplifiers that include built-in modeling tools. Some high-end modeling amplifiers such as Vox Valvetronix and 60/120 watt versions of Peavey Vypyr incorporate a digital modeling process with true vacuum tube amplification.
- Analog emulator
- The analog modeling system also exists; actually the first "modeling" device is analogous and uses common analog circuits in signal processing functions, such as filters, amplifiers, and "waveshapers". Conceptually "modeling" is an old scheme, and in essence one can think of a simple "waveshaper" diode trimmer as an "emulation" overdrive characteristic of a particular design (tube based). Similarly, we can assume an increase in the deliberate frequency response as an emulation, assuming an exemplary system also introduces an equally enhanced response. Throughout history, simple conceptual circuits mimicking certain attributes have evolved in topology becoming more and more complex to deliver more "detailed" or "realistic" emulation results. Basically, the concept of analog signal processing is old-fashioned but somewhat controversial when people start referring to certain processing techniques as "modeling". Tech21's SansAmp line of products (1989-) is one of the earliest examples of devices that were deliberately marketed as being capable of producing various "amplifier-specific" tones.
Another example of modeling circuit
A good example of a fairly complex series of analogue modeling is the design of Peavey's "T-Dynamics" power amplifier, which (using 100% analog circuits) emulates complex clippings and bias-shift characteristics of the push-pull tube power amplifier, and usually impedance high-ish output like that. Power amplifier Vox "Valve Reactor", Hughes & amp; Kettner's "Dynavalve" power amplifier, Pritchard guitar amplifier, and Quilter music instrument amplifier are other examples of units featuring similar analog circuit designs.
The earliest Roland "Blues Cube" amplifiers use analogue tube modeling circuits, although Roland does not model a special tube amplifier, moreover the overall characteristics of a generic tube preamplifier circuit. Peir preamplifier "TransTube" is a design that has similar properties. The Pritchard amplifier also modeled the characteristics of tube-based circuits in general and without attempting to model "amp-specific" tones per se.
Roland and Line 6 use analog power amplifier emulation in some of their amplifier models. Peavey's "Vypyr" transmitter series uses "TransTube" analogue circuits instead of digital waveshapers, and its Vox Valvetronix amplifier has historically presented semiconductor mating and analogue circuitry based on vacuum tubes and digital signal processing circuits.
References
Source of the article : Wikipedia
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