[sdiy] [OT] Analog synths with 2 pole filters

[KA4HJH]

On Feb 21, 2013, at 2:34 PM, Gordon JC Pearce wrote:

> On 21/02/13 18:26, KA4HJH wrote:
>> 
>> On Feb 21, 2013, at 11:36 AM, cheater cheater wrote:
>> 
>>> It's not like linearity is even desirable in a synth filter.
>>> 
>>> Many synths have diode clippers in the feedback path in order to
>>> change the loudness of the resonance vs the rest of the response, for
>>> one thing. It's very practical.
>> 
>> For example, the Oberheim SEM.
> 
> The Transcendent 2000 has a Zener diode in a diode bridge, in the filter feedback path.
> 


The SEM a resistor network with two 1N4148s paralleled.


Terry Bowman, KA4HJH
"The Mac Doctor"