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 Forum index » DIY Hardware and Software » Developers' Corner
Phase effect frequency responses
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abovenyquist



Joined: Aug 31, 2009
Posts: 55
Location: Atlanta
PostPosted: Fri Jun 17, 2022 8:48 pm    Post subject: Phase effect frequency responses
Subject description: Plotted using OCTAVE/MATLAB		 Reply with quote  Mark this post and the followings unread
If you haven't tried out Octave (which is free!) I highly recommend it. Here I use it to plot the frequency response of phase shift effects, including the effect of feedback:

https://youtu.be/LQKduqYg2eE

While I'm on the topic of frequency responses, here I compute the response of a passive two-pole RC filter used in the "Wein bridge oscillator" as well as some related active filter structures:

https://youtu.be/7qSXNtfTPfk

And here I compute the frequency of the so-called "treble bleed" circuit sometimes used in guitar electronics:

https://youtu.be/FIf2gIoxaQM
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blue hell
Site Admin


Joined: Apr 03, 2004
Posts: 24381
Location: The Netherlands, Enschede
Audio files: 296
G2 patch files: 320
PostPosted: Sat Jun 18, 2022 1:57 am    Post subject: Re: Phase effect frequency responses
Subject description: Plotted using OCTAVE/MATLAB		 Reply with quote  Mark this post and the followings unread
abovenyquist wrote:
"Wein bridge oscillator"


Wien, from Max Wien ... same name as the capital of Austria .. you say Vienna, they say Wien (and we say Wenen) :') (but according to Wikipedia William Hewlett invented the oscillator using the Wien bridge as a feedback element ... it must have been one of the first things I've made for beeps - a while after connecting the in and out of my tube amp with some resistor and cap stuff).

Would there be a Wein bridge over the Donau maybe in Wien I wonder ...

But eh, it is really great you are posting these tutorials, they nicely freshen up my rusty knowledge.

Thanks for that!
_________________
Jan
also .. could someone please turn down the thermostat a bit.
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