Re: [LAD] Permafrost guitar amp, was Re: RDF libraries, was Re: [ANN] IR: LV2 Convolution Reverb

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To: Giuseppe Zompatori <siliconjoe@...>
Cc: The Linux Audio Developers' Mailing List <linux-audio-dev@...>
Date: Saturday, March 5, 2011 - 6:18 pm

Ciao Giuseppe,

2011/3/5 Giuseppe Zompatori :

Heh.

>>The kind of stuff I'm trying to do is accurately model a class A amp

Strange: m_pi should be declared as a constant in
/usr/share/permafrost/lib/m.pmf or similar location... Oops, perhaps I
missed a "import m;" at the beginning of amp.pmf. Could you try that?

BTW, I should have put the sources online for those who wanted to try
it... my bad.

> Anyway, are you limited to the simulation of a half triode with white

It does a full simulation. What is not modeled is the grid current,
hence no blocking distortion.

> I think you should model at least both halves of a

In the sense that it sounds bad?

> Also class A amplifiers aren't very popular amongst guitar players

Yes, I know all of that. The problem is that each tube adds a
significant and difficult to handle nonlinearity, and it gets pretty
difficult to handle. With the current Permafrost you can model any
topology, but loops and conditions have to be implemented in C...
hence theoretically, yes you can, in practice it's really too hard and
the performance would be very poor.

I'm maybe going to work on this kind of stuff in the near future, but
I don't know yet what I will be doing in a couple of months. :-)

>>Well, they say guitarix has improved, yet the last time I was all but

Ah, never looked into how those plugins work.

Ciao,

Stefano
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Messages in current thread:
[LAD] Permafrost guitar amp, was Re: RDF libraries, was Re: ..., Giuseppe Zompatori, (Sat Mar 5, 5:55 pm)
Re: [LAD] Permafrost guitar amp, was Re: RDF libraries, was ..., Giuseppe Zompatori, (Sun Mar 6, 12:38 am)
Re: [LAD] Permafrost guitar amp, was Re: RDF libraries, was ..., Stefano D'Angelo, (Sat Mar 5, 6:18 pm)
Re: [LAD] Permafrost guitar amp, was Re: RDF libraries, was ..., Giuseppe Zompatori, (Sat Mar 5, 6:14 pm)
Re: [LAD] Permafrost guitar amp, was Re: RDF libraries, was ..., Giuseppe Zompatori, (Tue Mar 8, 4:56 pm)