Search found 52 matches

by Dominique
Sun Mar 03, 2019 9:08 pm
Forum: Developer's Section
Topic: dkbuilder: from circuit to LV2 plugin
Replies: 57
Views: 1780

Re: dkbuilder: from circuit to LV2 plugin

tramp wrote:I've now pushed a new version to git, introduce two new options,
-g N or --table_neg N = build negative nonlinear response table from the N\'t circuit
and
-S or --scip_div = skip the divider for the negative nonlinear response table


Thank you, I will try tomorrow.
by Dominique
Sat Mar 02, 2019 7:09 pm
Forum: Developer's Section
Topic: dkbuilder: from circuit to LV2 plugin
Replies: 57
Views: 1780

Re: dkbuilder: from circuit to LV2 plugin

That depend on your taste. I, for example, love it loud. Using a amplifier to amplify the incoming signal. My setting is that I can't hear my guitar, when connected via jack to output, without amplification. I do the same, I first setup the input chain so that the input peak level doesn't go over 0...
by Dominique
Sat Mar 02, 2019 7:02 pm
Forum: Developer's Section
Topic: dkbuilder: from circuit to LV2 plugin
Replies: 57
Views: 1780

Re: dkbuilder: from circuit to LV2 plugin

I made 2 simulations. The first one is a simple 2 stages preamp, the BlowMePreamplifier: https://pastebin.com/Mrj7uWPX and the BlowMeAmp: https://pastebin.com/hSYgmW0b It lack a tone control stage for now. The parameters for the transformers are guess for now. When I run ./build-plug.py -i BlowMeAmp...
by Dominique
Sat Mar 02, 2019 2:57 pm
Forum: Developer's Section
Topic: dkbuilder: from circuit to LV2 plugin
Replies: 57
Views: 1780

Re: dkbuilder: from circuit to LV2 plugin

I have a new question. When an amp plugin is loaded into JACK, it can provide a huge signal gain, and in order to not saturate jack , but to really get the sound of the plugin, the output level must be adjusted somewhere. Is it enough to assume than the output level of the plugin must be about the s...
by Dominique
Sat Mar 02, 2019 2:23 pm
Forum: Developer's Section
Topic: dkbuilder: from circuit to LV2 plugin
Replies: 57
Views: 1780

Re: dkbuilder: from circuit to LV2 plugin

R is the magnetic reluctance. Description of the modelling is here: https://www.vutbr.cz/www_base/zav_prace_soubor_verejne.php?file_id=60090 part 3.1.1 I am also reading one of the references of that paper https://www.researchgate.net/publication/220057543_Real-Time_Audio_Transformer_Emulation_for_...
by Dominique
Sat Mar 02, 2019 11:45 am
Forum: Developer's Section
Topic: dkbuilder: from circuit to LV2 plugin
Replies: 57
Views: 1780

Re: dkbuilder: from circuit to LV2 plugin

Here you'll find some nice schematics for speaker simulations, http://www.hexeguitar.com/diy/techinfo/cabsims Interesting! With my theremin, which I can also use as guitar amplifier, I made comparaison with its own speaker (an antique philips) and a Fender Champ speaker. The difference in sound is ...
by Dominique
Sat Mar 02, 2019 11:22 am
Forum: Developer's Section
Topic: dkbuilder: from circuit to LV2 plugin
Replies: 57
Views: 1780

Re: dkbuilder: from circuit to LV2 plugin

R is the magnetic reluctance. Description of the modelling is here: https://www.vutbr.cz/www_base/zav_prace_soubor_verejne.php?file_id=60090 part 3.1.1 Thanks Yes, one have to keep in mind that we use idealised models, without been bounded to real physics. I see that the Koren model in use in the d...
by Dominique
Fri Mar 01, 2019 6:26 pm
Forum: Developer's Section
Topic: dkbuilder: from circuit to LV2 plugin
Replies: 57
Views: 1780

Re: dkbuilder: from circuit to LV2 plugin

Thank you, I will try it later. For now, I am making a Blow Me Amplifier simulation with 2 x 6L6 in PP and a driver with a single ended EL84. It is simpler than the JCM or the Marshall and should provide a better sound. I call it the Blow Me Amp because if someone want to build it, he will have to c...
by Dominique
Thu Feb 28, 2019 11:32 pm
Forum: Developer's Section
Topic: dkbuilder: from circuit to LV2 plugin
Replies: 57
Views: 1780

Re: dkbuilder: from circuit to LV2 plugin

I simplified it further by replacing the Input and Volume potentiometers by resistors. I also changed the Vcmd, this make the sound louder, but the Gain pot still doesn't work.

https://pastebin.com/72CKxpFh
by Dominique
Thu Feb 28, 2019 10:45 pm
Forum: Developer's Section
Topic: dkbuilder: from circuit to LV2 plugin
Replies: 57
Views: 1780

Re: dkbuilder: from circuit to LV2 plugin

I added 2 Cga condensators, the Miller caps, and now the dkbuilder is happy:
https://pastebin.com/4kZN6r93

In guitarix, the control is here, I can change it, but it doesn't work, the sound doesn't change.
by Dominique
Thu Feb 28, 2019 10:30 pm
Forum: Developer's Section
Topic: dkbuilder: from circuit to LV2 plugin
Replies: 57
Views: 1780

Re: dkbuilder: from circuit to LV2 plugin

I rewrote it from the scratch in a simpler version starting with Startset.sch https://pastebin.com/ny0xXfeV It begin to work with "./build-plug.py -i VCA.sch --build -n VCAnt" build gx_plugin from: ['VCA.sch'] dkbuild/vcant/vcant.dsp:warning: parameters in dkbuild/vcant/vcant_ui.cc not fou...
by Dominique
Thu Feb 28, 2019 4:46 pm
Forum: Developer's Section
Topic: dkbuilder: from circuit to LV2 plugin
Replies: 57
Views: 1780

Re: dkbuilder: from circuit to LV2 plugin

I did a quick test, the In/Output miss the refdes field, you schould paste the ones from the Startset.sch. R4 should be P4 (P = variable resistor, 3 connection) and miss some values (value=500k,var=Trim,a=3), but even then, nothing comes out of the simulation. Now it work, but I get another error a...
by Dominique
Thu Feb 28, 2019 4:28 pm
Forum: Developer's Section
Topic: dkbuilder: from circuit to LV2 plugin
Replies: 57
Views: 1780

Re: dkbuilder: from circuit to LV2 plugin

I did a quick test, the In/Output miss the refdes field, you schould paste the ones from the Startset.sch. R4 should be P4 (P = variable resistor, 3 connection) and miss some values (value=500k,var=Trim,a=3), but even then, nothing comes out of the simulation. Now it work, but I get another error a...
by Dominique
Thu Feb 28, 2019 2:23 pm
Forum: Developer's Section
Topic: dkbuilder: from circuit to LV2 plugin
Replies: 57
Views: 1780

Re: dkbuilder: from circuit to LV2 plugin

Here is a paste of my modified VCA: https://pastebin.com/3ZcvUpAX When I try to build it, I get: Traceback (most recent call last): File "./build-plug.py", line 258, in <module> main(sys.argv[1:]) File "./build-plug.py", line 255, in main dk.build() File "./build-plug.py&quo...

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