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Old 24th February 2006, 07:59 AM   #1
beppe61 is offline beppe61  Italy
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Default Simulation software.

Dear Sirs,


I am looking for suggestion about a simulation software for audio circuit.
And of course your point of view about their utility.
Do you use them while designing circuits?
I find them extremely interesting.
The possibility to assess the overall quality of a circuit without having to actually build them is very convenient indeed.

Thank you all for any advice.
Kind regards,

beppe
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Old 24th February 2006, 08:38 AM   #2
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Greetings from Norfolk

Simulation Programmes are all very good, but most have their achilies heels. The results can only be as good as the model of the circuit. The simulation of the active devices may, in some cases, be inadequate for the full realisation of the true circuit. Also, the circuit as entered by the user needs to be 'complete' - for the higher frequency end of the audio spectrum the effect of stray capacity cannot be ignored.

With all this said they are a very useful TOOL, but the results must be used with inteligence, and the only TRUE test of a design is to build it and listen to it.

Richard
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Old 24th February 2006, 09:33 AM   #3
beppe61 is offline beppe61  Italy
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Quote:
Originally posted by Gandalph
Greetings from Norfolk
1) Simulation Programmes are all very good, but most have their achilies heels.
...
2) the only TRUE test of a design is to build it and listen to it.
Richard
Dear Mr. Gandalph,

thank you sincerely for your kind and valuable reply.
1) do you have any software of choice? or have heard of one particularly dependable?
2) I have to tell you that I suspected so.

Thank you so much again.
Kind regards,

beppe
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Old 24th February 2006, 11:37 AM   #4
cs is offline cs  United Kingdom
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Beppe,

TI do quite a useful Spice simulator, which can be downloaded free here :-
http://focus.ti.com/docs/toolsw/folders/print/tina-ti.html

Chris.
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Old 24th February 2006, 01:32 PM   #5
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Default Re: Simulation software.

Quote:
Originally posted by beppe61
Dear Sirs,


I am looking for suggestion about a simulation software for audio circuit.
And of course your point of view about their utility.
Do you use them while designing circuits?
I find them extremely interesting.
The possibility to assess the overall quality of a circuit without having to actually build them is very convenient indeed.

Thank you all for any advice.
Kind regards,

beppe
Hi beppe,

You can try LTSpice ( www.linear.com/software/ )

It is free, offers very good features (enough to get you going with audio circuit simulations). Also and important, it is easy to use. You just have to obtain your components' models and plug in it, since it doesn't have a very large library, but that's not the end of the world.

Best regards,

Joćo Pedro
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Old 24th February 2006, 04:16 PM   #6
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Beppe

try Microcap 8 Demo. Only 50 components but it i love it.



ciao
Federico
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Old 24th February 2006, 10:05 PM   #7
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Beppe, I found this tool today

http://www.catena.uk.com/

I must say it has impressed me so far. And its free to use with some limits.

/Andy
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Old 25th February 2006, 05:09 AM   #8
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If you use OS X try iSugar

it open source and seems to work pretty well - main problem (which I have inexplicably not seriously tried to solve) is that it does not want to work with JFET models, have to email the developer (who unfortunately says he is no lomger developing the program) and maybe get my hands dirty.
Also it does not have a lot of models but they are not hard to add.

Bill
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Old 25th February 2006, 05:16 AM   #9
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And of of course there is an open source linux/unix/etc set of tools, gEDA which I have in the past started to get to run on my iBook, but never found enough time to get running so I can't give any opinions on. Billy Bob says '.. you'll have to check it out yourself.. '

Bill ( not Billy...)
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Old 25th February 2006, 05:23 AM   #10
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Oh and on Open Collector I found some time ago a Java based program which in theory should work 'anywhere'. I did get it to run under OS X and got too busy at work and now I cannot remember why I did not go back and use it/learn it maybe I just forgot about it until just now.
Now if I can just find it again maybe I'll try it and I will be able to sim some JFET circuits... or maybe I'll just build them!!!!

Bill
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