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Searching for tube simulation, gain, distortion algorithms
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July 11, 2013
7:11 pm
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Christian
Ilmenau, Germany
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Hey guys!

So far I have found some algorithms for amp simulation on the internet, but I'd like to know
if you know or have some cool algorithm I really should check out.

Have a nice day!

July 11, 2013
11:40 pm
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W Pirkle
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A good starting point (that has lots of references you can also study) is here: A Review of Digital Techniques for Modeling Vacuum-Tube Guitar Amplifiers

http://www.mitpressjournals.or.....09.33.2.85

For some deeper reading (and many more resources to research) you can check out the PhD Thesis of David Yeh, one of the authors of the above: "DIGITAL IMPLEMENTATION OF MUSICAL DISTORTION CIRCUITS BY ANALYSIS AND SIMULATION"

https://ccrma.stanford.edu/~dtyeh/papers/DavidYehThesissinglesided.pdf

There is a lot of fragmented information out there; if anyone has some more consolidated links please feel free to post them.

July 22, 2013
4:01 am
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thudson
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July 19, 2013
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I will add knowing how a tube amp operates and how they are designed can give you a lot of insight on how to model them. There's a wealth of information here:

http://www.valvewizard.co.uk

I can also highly recommend his books. Knowing how to read tube data sheets and load lines can help a lot. You can find most data sheets here:

http://tdsl.duncanamps.com/tub.....search.php

Lastly, this forum is where guys that build and design amps hang out:

http://ampgarage.com/

This is a thread which lists reading material for tube amp theory:

http://ampgarage.com/forum/vie.....php?t=9023

Most of my experience comes from building real amps. I've just purchased Will's book in hopes of creating some plugins built from real tube amp measurements. For example, depending on the rectifier type and filtering, a tube amp power supply will sag different amounts, which changes the transfer characteristics and operating point of each individual tube.

Hope this helps.

August 5, 2013
7:25 pm
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W Pirkle
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Here are a couple of newer sources - both very interesting; also drill down into their sources:

REAL-TIME GUITAR TUBE AMPLIFIER SIMULATION USING AN APPROXIMATION OF
DIFFERENTIAL EQUATIONS:
http://dafx10.iem.at/papers/Ma.....10_P12.pdf

REAL-TIME SIMULATION OF A GUITAR POWER AMPLIFIER
http://articles.ircam.fr/texte...../index.pdf

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