Great techie article hosted by Kewlpack
http://www.thestompbox.net/ViewArticle.aspx?ArticleID=32
Thank's Kewlpack, that a really great article that you have posted on your site. I like all the graphs of frequency response of overdrive units.
Your article seems to fit in well with similar articles by SteveK at GNX4.org
Such articles are sure to pique the interest of budding engineers around us.
However I see a slight problem : A distortion unit is famous for, well, er, distorting.
It does that by a nonlinear transfer function.
The most important graph of a distortion unit is its nonlinear transfer function graph. You dont have those on your site at the moment and I would urge you to do them.
Your graphs are of total frequency response of a signal via an OD/DIST
This is equal to the total response of Pre-equaliser + reduction in input sine wave due to Harmonics created by the OD + Post Equaliser + Tone control.
This means nothing at all for MFX units where one can set the various internal equalisers. Ie any frequency response graph can be created using any OD model by just setting the equalisers accordingly.
This leads to the realisation that the frequency response graphs do not depict anything related specifically to the OD being studied !!!
Could you please do Transfer function graphs of OD like these :
Here are some useful techie articles on Distortion :
http://www.geofex.com/effxfaq/distn101.htm
http://www.mindspring.com/~j.blackstone/dist101.htm
http://en.wikipedia.org/wiki/Tube_sound
Here is a link to an actual study of transfer functions of a Guitar Tube Amp at different distortion levels
http://online.physics.uiuc.edu/.../phys498pom/Student_Projects/Spring05/Ben_Wojtowicz/Ben_Wojtowicz_Amp_Testing.pdf
Thank you for your technical inputs to the community !!
Thank's Kewlpack, that a really great article that you have posted on your site. I like all the graphs of frequency response of overdrive units.
Your article seems to fit in well with similar articles by SteveK at GNX4.org
Such articles are sure to pique the interest of budding engineers around us.
However I see a slight problem : A distortion unit is famous for, well, er, distorting.
It does that by a nonlinear transfer function.
The most important graph of a distortion unit is its nonlinear transfer function graph. You dont have those on your site at the moment and I would urge you to do them.
Your graphs are of total frequency response of a signal via an OD/DIST
This is equal to the total response of Pre-equaliser + reduction in input sine wave due to Harmonics created by the OD + Post Equaliser + Tone control.
This means nothing at all for MFX units where one can set the various internal equalisers. Ie any frequency response graph can be created using any OD model by just setting the equalisers accordingly.
This leads to the realisation that the frequency response graphs do not depict anything related specifically to the OD being studied !!!
Could you please do Transfer function graphs of OD like these :
Here are some useful techie articles on Distortion :
http://www.geofex.com/effxfaq/distn101.htm
http://www.mindspring.com/~j.blackstone/dist101.htm
http://en.wikipedia.org/wiki/Tube_sound
Here is a link to an actual study of transfer functions of a Guitar Tube Amp at different distortion levels
http://online.physics.uiuc.edu/.../phys498pom/Student_Projects/Spring05/Ben_Wojtowicz/Ben_Wojtowicz_Amp_Testing.pdf
Thank you for your technical inputs to the community !!
Comments
And Kewlpack's site now reminds me of AlbertA's !!!
I am a Sound Engineer with some courses on Electrical Engineering ( never got a degree as my GF got pregnant and we needed immediate money !!!)
while from my research, Web Surf is a Programmer/Photographer, AlbertA is a Mathematician/Photographer, Kewlpack is a Programmer/ Photographer.
But I suppose all technical people sound the same...............
.............. boring !!!
Just added it to my favorites...