[sdiy] Ring Mod (was Re: Hadamard Transform Network)

[Paul Perry]

Shouldn't those filters be 90 degree phase shift allpass filters?
I remember something like that being used to shift a public adress amplifier
signal by 5Hz to stop feedback.
I remember the term "dome filter".

paul perry Melbourne Australia

----- Original Message ----- 
>> I just wanted to say here publicly that I tried to build a Weaver 
>> frequency
>> shifter from two 4-quadrant balanced modulators, two SV filters, and some
>> sinewave oscillators.  All the bits and pieces worked perfectly, and I
>> derived, rederived, checked and rechecked all the math and was absolutely
>> sure that everything was hooked up correctly.  It didn't work.  I gave up 
>> on
>> the whole idea.  I don't believe that a musical Weaver frequency shifter 
>> can
>> be built.