Re: [Csnd] Porting Guitarix tube preamp models to Csound?

Date	2014-04-08 10:40
From	"vallste@libero.it"
Subject	Re: [Csnd] Porting Guitarix tube preamp models to Csound?
	Could you please post the udo code you have? I'm not getting the same results. Stefano >----Messaggio originale---- >Da: Victor.Lazzarini@nuim.ie >Data: 08/04/2014 10.38 >A: >Ogg: Re: [Csnd] Porting Guitarix tube preamp models to Csound? > >I just ran your code here and I am not getting noise at the UDO output. >There is no distortion either, the output is generally clean. > >======================== >Dr Victor Lazzarini >Senior Lecturer >NUI Maynooth, Ireland >victor dot lazzarini at nuim dot ie > > > > >On 7 Apr 2014, at 20:42, vallste@libero.it wrote: > >> Thanks Victor, it's sill not working as expected but at least the code looks >> better eh eh eh >> Stefano >> >>> ----Messaggio originale---- >>> Da: Victor.Lazzarini@nuim.ie >>> Data: 07/04/2014 21.32 >>> A: >>> Ogg: Re: [Csnd] Porting Guitarix tube preamp models to Csound? >>> >>> Other areas that can be simplified: >>> >>> Instead of implementing linear interpolation in the code, you can just use a >> linear >>> interp table reader, tabiei (in csound6 it accepts non-pow-of-two tables). >>> All of these lines >>> >>> ki = int(af) >>> if ki < 0 then >>> aFtube tab 0, itableValve >>> elseif ki >= itabsize then >>> aFtube tab itabsize - 1, itableValve >>> else >>> af = af - ki >>> kreadT1 tab ki, itableValve >>> kreadT2 tab ki + 1, itableValve >>> aFtube = kreadT1 * (1 - af) + kreadT2 * af >>> endif >>> >>> >>> get replaced by a single line >>> >>> aFtube tablei af, itableValve >>> >>> >>> Victor >>> On 7 Apr 2014, at 20:16, vallste@libero.it wrote: >>> >>>> Yes, I was trying this but unfortunately it's still a noise generator. >>>> >>>> >>>>> ----Messaggio originale---- >>>>> Da: Victor.Lazzarini@nuim.ie >>>>> Data: 07/04/2014 21.10 >>>>> A: >>>>> Ogg: Re: [Csnd] Porting Guitarix tube preamp models to Csound? >>>>> >>>>> In other words, removing the delayr/w, we can have >>>>> >>>>> aFtubeOld init 0 >>>>> aIn_Ftube = aFtubeOld + aIn_tube - kVk0 >>>>> ; >>>>> ;itableValve;see table .cc >>>>> ;ktablow see table .cc for the valve type >>>>> ;ktabhigh see table .cc for the valve type >>>>> ;ktabistep see table .cc for the valve type >>>>> ;itabsize len of the table see table .cc for the valve type >>>>> aVgk = aIn_Ftube >>>>> af = (aVgk - ktablow) * ktabistep >>>>> ki = int(af) >>>>> if ki < 0 then >>>>> aFtube tab 0, itableValve >>>>> elseif ki >= itabsize then >>>>> aFtube tab itabsize - 1, itableValve >>>>> else >>>>> af = af - ki >>>>> kreadT1 tab ki, itableValve >>>>> kreadT2 tab ki + 1, itableValve >>>>> aFtube = kreadT1 * (1 - af) + kreadT2 * af >>>>> endif >>>>> ; >>>>> aFtubeOut = (aFtube + aVkC - kvplus) >>>>> aFtubeOld butlp aFtubeOut * kRk/kRp, kfck >>>>> >>>>> >>>>> On 7 Apr 2014, at 20:04, Victor Lazzarini wrote: >>>>> >>>>>> why the delay line? If it's a 1-sample delay you want to do, it's a bit >>>> cumbersome to use it for that. >>>>>> It's simpler to do this (ksmps = 1), for example for a 1st order filter >>>>>> >>>>>> adel init 0 >>>>>> ay = ainia + adelib >>>>>> adel = ay >>>>>> >>>>>> adel is a 1-sample feedback delay. >>>>>> >>>>>> >>>>>> On 7 Apr 2014, at 18:07, vallste@libero.it wrote: >>>>>> >>>>>>> Hello, >>>>>>> I'm trying to port Gutarix tubes emulations to Csound ( I know that is >>>> possible to export as csound plugins but want to try the long way). >>>>>>> Under Faust sources there are the examples >>>>>>> http://sourceforge. >> net/p/faudiostream/code/ci/master/tree/examples/faust- >>>> tubes/ >>>>>>> and data used for transfer functions for each tube model (files valve. >> h, >>>> tube.lib, preamp.dsp, and .cc files for tubes). >>>>>>> >>>>>>> Attached here is my tentative udo (plus a couple tube emulations >> transfer >>>> funcions used by gen23) and a file to test it but everything I can obtain >> is a >>>> nice noise generator with only one stage of amplification, go figure what >>>> happen if you add more than one...Suspect that there is a problem on how I >>>> implemented recursion with delayw/r. >>>>>>> >>>>>>> Anyone would like to give a look to the code to see what I'm doing >> wrong? >>>>>>> I've put output to disk in the tubetest.csd to avoid bad surpises to >> the >>>> speakers. >>>>>>> >>>>>>> Bye >>>>>>> Stefano >>>>>>> <12ax7_250k.inc><12ax7_68k.inc><12at7_250k. >>>> inc><12at7_68k.inc> >>>>>> >>>>>> Dr Victor Lazzarini >>>>>> Senior Lecturer >>>>>> Dept. of Music >>>>>> NUI Maynooth Ireland >>>>>> tel.: +353 1 708 3545 >>>>>> Victor dot Lazzarini AT nuim dot ie >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> Send bugs reports to >>>>>> https://github.com/csound/csound/issues >>>>>> Discussions of bugs and features can be posted here >>>>>> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe >>>> csound" >>>>>> >>>>>> >>>>>> >>>>> >>>>> Dr Victor Lazzarini >>>>> Senior Lecturer >>>>> Dept. of Music >>>>> NUI Maynooth Ireland >>>>> tel.: +353 1 708 3545 >>>>> Victor dot Lazzarini AT nuim dot ie >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> Send bugs reports to >>>>> https://github.com/csound/csound/issues >>>>> Discussions of bugs and features can be posted here >>>>> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe >>>> csound" >>>>> >>>>> >>>>> >>>>> >>>> >>>> >>>> >>>> >>>> Send bugs reports to >>>> https://github.com/csound/csound/issues >>>> Discussions of bugs and features can be posted here >>>> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe >> csound" >>>> >>>> >>>> >>> >>> Dr Victor Lazzarini >>> Senior Lecturer >>> Dept. of Music >>> NUI Maynooth Ireland >>> tel.: +353 1 708 3545 >>> Victor dot Lazzarini AT nuim dot ie >>> >>> >>> >>> >>> >>> Send bugs reports to >>> https://github.com/csound/csound/issues >>> Discussions of bugs and features can be posted here >>> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe >> csound" >>> >>> >>> >>> >> >> >> >> >> Send bugs reports to >> https://github.com/csound/csound/issues >> Discussions of bugs and features can be posted here >> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe csound" >> >> >> > > > >Send bugs reports to > https://github.com/csound/csound/issues >Discussions of bugs and features can be posted here >To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe csound" > > > >

Date	2014-04-08 11:00
From	Victor Lazzarini
Subject	Re: [Csnd] Porting Guitarix tube preamp models to Csound?
	I’m actually using the code that you posted, just replacing the input file with something I have here. ======================== Dr Victor Lazzarini Senior Lecturer NUI Maynooth, Ireland victor dot lazzarini at nuim dot ie On 8 Apr 2014, at 10:40, vallste@libero.it wrote: > Could you please post the udo code you have? I'm not getting the same results. > Stefano > >> ----Messaggio originale---- >> Da: Victor.Lazzarini@nuim.ie >> Data: 08/04/2014 10.38 >> A: >> Ogg: Re: [Csnd] Porting Guitarix tube preamp models to Csound? >> >> I just ran your code here and I am not getting noise at the UDO output. >> There is no distortion either, the output is generally clean. >> >> ======================== >> Dr Victor Lazzarini >> Senior Lecturer >> NUI Maynooth, Ireland >> victor dot lazzarini at nuim dot ie >> >> >> >> >> On 7 Apr 2014, at 20:42, vallste@libero.it wrote: >> >>> Thanks Victor, it's sill not working as expected but at least the code > looks >>> better eh eh eh >>> Stefano >>> >>>> ----Messaggio originale---- >>>> Da: Victor.Lazzarini@nuim.ie >>>> Data: 07/04/2014 21.32 >>>> A: >>>> Ogg: Re: [Csnd] Porting Guitarix tube preamp models to Csound? >>>> >>>> Other areas that can be simplified: >>>> >>>> Instead of implementing linear interpolation in the code, you can just use > a >>> linear >>>> interp table reader, tabiei (in csound6 it accepts non-pow-of-two > tables). >>>> All of these lines >>>> >>>> ki = int(af) >>>> if ki < 0 then >>>> aFtube tab 0, itableValve >>>> elseif ki >= itabsize then >>>> aFtube tab itabsize - 1, itableValve >>>> else >>>> af = af - ki >>>> kreadT1 tab ki, itableValve >>>> kreadT2 tab ki + 1, itableValve >>>> aFtube = kreadT1 * (1 - af) + kreadT2 * af >>>> endif >>>> >>>> >>>> get replaced by a single line >>>> >>>> aFtube tablei af, itableValve >>>> >>>> >>>> Victor >>>> On 7 Apr 2014, at 20:16, vallste@libero.it wrote: >>>> >>>>> Yes, I was trying this but unfortunately it's still a noise generator. >>>>> >>>>> >>>>>> ----Messaggio originale---- >>>>>> Da: Victor.Lazzarini@nuim.ie >>>>>> Data: 07/04/2014 21.10 >>>>>> A: >>>>>> Ogg: Re: [Csnd] Porting Guitarix tube preamp models to Csound? >>>>>> >>>>>> In other words, removing the delayr/w, we can have >>>>>> >>>>>> aFtubeOld init 0 >>>>>> aIn_Ftube = aFtubeOld + aIn_tube - kVk0 >>>>>> ; >>>>>> ;itableValve;see table .cc >>>>>> ;ktablow see table .cc for the valve type >>>>>> ;ktabhigh see table .cc for the valve type >>>>>> ;ktabistep see table .cc for the valve type >>>>>> ;itabsize len of the table see table .cc for the valve type >>>>>> aVgk = aIn_Ftube >>>>>> af = (aVgk - ktablow) * ktabistep >>>>>> ki = int(af) >>>>>> if ki < 0 then >>>>>> aFtube tab 0, itableValve >>>>>> elseif ki >= itabsize then >>>>>> aFtube tab itabsize - 1, itableValve >>>>>> else >>>>>> af = af - ki >>>>>> kreadT1 tab ki, itableValve >>>>>> kreadT2 tab ki + 1, itableValve >>>>>> aFtube = kreadT1 * (1 - af) + kreadT2 * af >>>>>> endif >>>>>> ; >>>>>> aFtubeOut = (aFtube + aVkC - kvplus) >>>>>> aFtubeOld butlp aFtubeOut * kRk/kRp, kfck >>>>>> >>>>>> >>>>>> On 7 Apr 2014, at 20:04, Victor Lazzarini wrote: >>>>>> >>>>>>> why the delay line? If it's a 1-sample delay you want to do, it's a > bit >>>>> cumbersome to use it for that. >>>>>>> It's simpler to do this (ksmps = 1), for example for a 1st order filter >>>>>>> >>>>>>> adel init 0 >>>>>>> ay = ainia + adelib >>>>>>> adel = ay >>>>>>> >>>>>>> adel is a 1-sample feedback delay. >>>>>>> >>>>>>> >>>>>>> On 7 Apr 2014, at 18:07, vallste@libero.it wrote: >>>>>>> >>>>>>>> Hello, >>>>>>>> I'm trying to port Gutarix tubes emulations to Csound ( I know that > is >>>>> possible to export as csound plugins but want to try the long way). >>>>>>>> Under Faust sources there are the examples >>>>>>>> http://sourceforge. >>> net/p/faudiostream/code/ci/master/tree/examples/faust- >>>>> tubes/ >>>>>>>> and data used for transfer functions for each tube model (files valve. >>> h, >>>>> tube.lib, preamp.dsp, and .cc files for tubes). >>>>>>>> >>>>>>>> Attached here is my tentative udo (plus a couple tube emulations >>> transfer >>>>> funcions used by gen23) and a file to test it but everything I can > obtain >>> is a >>>>> nice noise generator with only one stage of amplification, go figure > what >>>>> happen if you add more than one...Suspect that there is a problem on how > I >>>>> implemented recursion with delayw/r. >>>>>>>> >>>>>>>> Anyone would like to give a look to the code to see what I'm doing >>> wrong? >>>>>>>> I've put output to disk in the tubetest.csd to avoid bad surpises to >>> the >>>>> speakers. >>>>>>>> >>>>>>>> Bye >>>>>>>> Stefano >>>>>>>> <12ax7_250k.inc><12ax7_68k.inc><12at7_250k. >>>>> inc><12at7_68k.inc> >>>>>>> >>>>>>> Dr Victor Lazzarini >>>>>>> Senior Lecturer >>>>>>> Dept. of Music >>>>>>> NUI Maynooth Ireland >>>>>>> tel.: +353 1 708 3545 >>>>>>> Victor dot Lazzarini AT nuim dot ie >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> Send bugs reports to >>>>>>> https://github.com/csound/csound/issues >>>>>>> Discussions of bugs and features can be posted here >>>>>>> To unsubscribe, send email sympa@lists.bath.ac.uk with body > "unsubscribe >>>>> csound" >>>>>>> >>>>>>> >>>>>>> >>>>>> >>>>>> Dr Victor Lazzarini >>>>>> Senior Lecturer >>>>>> Dept. of Music >>>>>> NUI Maynooth Ireland >>>>>> tel.: +353 1 708 3545 >>>>>> Victor dot Lazzarini AT nuim dot ie >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> Send bugs reports to >>>>>> https://github.com/csound/csound/issues >>>>>> Discussions of bugs and features can be posted here >>>>>> To unsubscribe, send email sympa@lists.bath.ac.uk with body > "unsubscribe >>>>> csound" >>>>>> >>>>>> >>>>>> >>>>>> >>>>> >>>>> >>>>> >>>>> >>>>> Send bugs reports to >>>>> https://github.com/csound/csound/issues >>>>> Discussions of bugs and features can be posted here >>>>> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe >>> csound" >>>>> >>>>> >>>>> >>>> >>>> Dr Victor Lazzarini >>>> Senior Lecturer >>>> Dept. of Music >>>> NUI Maynooth Ireland >>>> tel.: +353 1 708 3545 >>>> Victor dot Lazzarini AT nuim dot ie >>>> >>>> >>>> >>>> >>>> >>>> Send bugs reports to >>>> https://github.com/csound/csound/issues >>>> Discussions of bugs and features can be posted here >>>> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe >>> csound" >>>> >>>> >>>> >>>> >>> >>> >>> >>> >>> Send bugs reports to >>> https://github.com/csound/csound/issues >>> Discussions of bugs and features can be posted here >>> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe > csound" >>> >>> >>> >> >> >> >> Send bugs reports to >> https://github.com/csound/csound/issues >> Discussions of bugs and features can be posted here >> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe > csound" >> >> >> >> > > > > > Send bugs reports to > https://github.com/csound/csound/issues > Discussions of bugs and features can be posted here > To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe csound" > > >