Hello,
On 13.01.2015 04:20, Martin Peach wrote:
I was looking at circuit diagrams for analog synthesizers recently and noticed that the "resonance" control is nothing more than feeding some fraction of the output back to the input. With more feedback oscillation occurs at the cutoff frequency for any type of filter, highpass, bandpass or lowpass.
Martin
when i asked about the difference between the meaning of 'Q' in filters regarding a parametric EQ on a mixing console and the 'Q'/Resonance knob on [analogue synthesizer] filters, i was given an explanation along the lines of 'Q on a parametric eq will adjust the bandwith of the filter while the Q / resonance knob on the other one will adjust the amount of the feedback [back into its input]. Both however will have a similar impact: Reducing the available bandwith will lead to similar results as increasing the amount of "data" in the system.'
hope that isn't too simplified, if it is, i recommend watching Aaron Lantermans lectures on filters on the web.
hth, Tee