I'm still confused since all I can obtain is a variable degree of noise (even 
with an oscillator with a sinewave of  32768 points). 
Depending on the input sound volume things get a little better , for example 
replacing the diskin2 with this (0dbfs  = 1 in the header):
asound oscili .05, 440, 1
makes things a little bit intellegible but there is still a huge noise 
component in the output sound.


>----Messaggio originale----
>Da: Victor.Lazzarini@nuim.ie
>Data: 08/04/2014 12.00
>A: 
>Ogg: 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 = ain*ia + adel*ib
>>>>>>>> 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"
>> 
>> 
>> 
>
>
>
>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"
>
>
>
>

No noise here, I’m using Csound from yesterday’s sources, your code produces a clear output (see attached)


========================
Dr Victor Lazzarini
Senior Lecturer
NUI Maynooth, Ireland
victor dot lazzarini at nuim dot ie




On 8 Apr 2014, at 16:42, vallste@libero.it wrote:

> I'm still confused since all I can obtain is a variable degree of noise (even 
> with an oscillator with a sinewave of  32768 points). 
> Depending on the input sound volume things get a little better , for example 
> replacing the diskin2 with this (0dbfs  = 1 in the header):
> asound oscili .05, 440, 1
> makes things a little bit intellegible but there is still a huge noise 
> component in the output sound.
> 
> 
>> ----Messaggio originale----
>> Da: Victor.Lazzarini@nuim.ie
>> Data: 08/04/2014 12.00
>> A: 
>> Ogg: 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 = ain*ia + adel*ib
>>>>>>>>> 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"
>>> 
>>> 
>>> 
>> 
>> 
>> 
>> 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"
> 
> 
>