[LAD] [ann] CAPS 0.4.0
The C* Audio Plugin Suite reincarnates as version 0.4.0. CAPS is a collection of LADSPA plugins enjoying worldwide favour for its instrument amplifier emulation. In addition, it provides a sizeable assortment of acclaimed audio DSP units, sound generators and effects. CAPS is distributed as open source under the terms of the GNU Public License. http://quitte.de/dsp/caps.html http://quitte.de/dsp/caps_0.4.0.tar.gz This release sees the addition of the fine work of David Yeh at CCRMA on the emulation of classic tube amplifier tone stack circuits (more here: http://ccrma.stanford.edu/~dtyeh/tonestack/ ). Three new plugins are building on the tone stack: ToneStack and ToneStackLT offer isolated implementations, while the new AmpVTS unit combines a refined AmpV and a ToneStack circuit. I'm very grateful to David for his brilliant contribution, and I'm quite positive that those who actively use the CAPS Amps will share this sentiment. Also primarily aimed at the discerning guitarist is the new AutoWah plugin, offering a versatile rendition of this classic audio effect. The last new plugin is Eq2x2, a two-channel 10-band graphic equalizer modeled after an analogue design. -*- Beyond the new plugins, this release also brings tons of major improvements "under the hood". All plugins have been hardened to work glitch-free in the face of invalid control input. Much effort has also been spent on further elimination of denormal numbers everywhere. Parameter smoothing (which is performed in order to prevent zipper noise) has been refined never to occur at the start of processing. The build process can now be configured to take advantage of the SSE and SSE3 extensions on the i686 platform, providing slight performance gains and automatic denormal protection. The HTML documentation has been thoroughly updated to reflect all changes. Finally, thanks to Paul Winkler CAPS now comes with an improved RDF file containing plugin categorisation. For the near-complete list of changes please see http://quitte.de/dsp/caps.html#Changelog -*- Don't hesitate to let me know what you think. Enjoy, and thank you for using CAPS, Tim ___ Linux-audio-dev mailing list Linux-audio-dev@lists.linuxaudio.org http://lists.linuxaudio.org/mailman/listinfo.cgi/linux-audio-dev
Re: [LAD] [ann] CAPS 0.4.0
Good news! I get a lot of use out of CAPS, and with each release it gets better. Any chance the next Amp incarnation will include a presence control? I believe they work by controlling the amount of negative feedback in the power amp stage. -PW On Sun, Jun 17, 2007 at 04:14:26PM +0200, Tim Goetze wrote: > > The C* Audio Plugin Suite reincarnates as version 0.4.0. -- Paul Winkler http://www.slinkp.com ___ Linux-audio-dev mailing list Linux-audio-dev@lists.linuxaudio.org http://lists.linuxaudio.org/mailman/listinfo.cgi/linux-audio-dev
Re: [LAD] [ann] CAPS 0.4.0
2007/6/17, Tim Goetze <[EMAIL PROTECTED]>: This release sees the addition of the fine work of David Yeh at CCRMA on the emulation of classic tube amplifier tone stack circuits (more here: http://ccrma.stanford.edu/~dtyeh/tonestack/ ). Three new plugins are building on the tone stack: ToneStack and ToneStackLT offer isolated implementations, while the new AmpVTS unit combines a refined AmpV and a ToneStack circuit. I'm very grateful to David for his brilliant contribution, and I'm quite positive that those who actively use the CAPS Amps will share this sentiment. Tim, At first Congrats for your new CAPS release! I have a couple of questions for you, namely: Could you please elaborate a little more on the new amp model? i.e: Is it based on real measured data as opposed to spice simulations? If it's based on a spice simulation did you implement a simple valve stage or a complete preamp made of multiple stages? The power amp section (valves & OT) doesn't seem to be there anyway AFAIK, but maybe you implemented it with a transfer function of your real Fender amp that does from the input jack to the OT/speaker? I am browsing the source code right now and can't easily figure out which 12ax7 model you're finally happy with... there are multiple ones in TwelveAX7.h I am asking this as I'd like to experiment with it a little. I still think there are issues that prevent obtaining more "M*rshally sounds" or high gain sounds in general. Thanks in advance. Cheers, -Giuseppe ___ Linux-audio-dev mailing list Linux-audio-dev@lists.linuxaudio.org http://lists.linuxaudio.org/mailman/listinfo.cgi/linux-audio-dev
Re: [LAD] simulating analog audio devices part II
hi Giuseppe would it be at all possible to provide a link to the ltspice file you made of the amp? i am having trouble finding out how to do things like output transformers well, and didn't even imagine the possibility of spice simulating a particular speaker. whilst i am eagerly watching the ngspice patchset i would like to play around with one that i know works so that i can make sure i'm doing things right. ps. where abouts did you get the models for the transformers, valves and speaker from? and how did you simulate the reverb section? cheers porl On 08/06/07, Giuseppe Zompatori <[EMAIL PROTECTED]> wrote: Hi, Some time ago I did a sim using LTSpice (http://www.linear.com/designtools/software/) under Wine of a Carvin Legacy tube amp. LTSpice was the only program that had wav in/out and would run on Linux at the time I tried this. The schematic for the amp is here (http://carvinmuseum.com/pdf/amps/VL100%20&%20VL212%20Legacy%20Amp.pdf). It's a complex beast that ngspice would have lots of troubles simulating because of the infamous "floating nodes" and other quirks. Everything is included into the sim, preamp, phase splitter, output valves , output transformer and even the model of a greenback speaker. Naively, I haven't set the sim time step to the a sampling freq related number, nevertheless it sounds Ok to me, I dont know how LTSpice deals with transient sims involving wav files in details. The ogg for the sim is here: http://siliconjoe.googlepages.com/legacy-swcadiii-1-cab-reverb-delay.ogg I played a bounch of fast licks to have the transient sim finish before the universe will collapse, yeah you guessed it it's pretty slow... I think it took 1 day to finish on an AthlonXP 2800+... Now days I am messing around with GNUCap and QUCS (http://qucs.sf.net) to which I just ported my first tube model whose plate voltage/grid current curves look like that: http://siliconjoe.googlepages.com/Schermata.png Hopefully a way to inject wav files in both GNUCap and QUCS will come true as they both seem better than spice derived programs. Cheers, -Giuseppe ___ Linux-audio-dev mailing list Linux-audio-dev@lists.linuxaudio.org http://lists.linuxaudio.org/mailman/listinfo.cgi/linux-audio-dev ___ Linux-audio-dev mailing list Linux-audio-dev@lists.linuxaudio.org http://lists.linuxaudio.org/mailman/listinfo.cgi/linux-audio-dev
