[sdiy] diode war

[ben]

one other thing i just thought of, negative feedback makes zout=0 right?
diodes in the feedback loop would cause the opamp at low voltages to behave
as though it was open loop (no negative feedback so zout is not always zero)
thus wouldn't the load on the distortion circuit also charcterise the sound?

or do i still have alot to learn about opamps (i'm still a student after
all)

on 8/10/02 4:44 PM, ben at benj at iinet.net.au wrote:

> i guess component choice here is very subjective, but i found some el cheapo
> green LEDs sounded the good.
> 
> but on the topic of diodes in the feedback loop of an opamp, how much would
> the opamp itself characterise the sound. im guessing that because in
> general, lowering the gain of an opamp increases bandwidth, the high gain at
> low voltages and low gain at high voltages caused by the diodes in the
> feedback loop, would make the gain/bandwidth characteristics of the opamp a
> major consideration in this sort of distortion circuit. but i have no idea
> how this affects the sound.
> 
> any thoughs and ideas?
> 
> 
> ben
> on 8/10/02 4:22 AM, Dave Krooshof at synthos at xs4all.nl wrote:
> 
>> [blue] I now have blue LEDs in them (open @ 1.5 volt), they sound fairly
>> clean.
>> That is: this is just clipping, not a distortion. Cool as in not warm.
>> 
>> [red] I'll make a switch to hook the semi-transperant light-red LEDs in
>> again,
>> as those sound crazy in the midrange. Wow!
>> 
>> So the QUESTION is:
>> What's _your_ favourite clipping component?
> 
>