Clavia lead 2x Guida Utente

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Resonance in a filter is created by connecting the output of the filter to its input, in other words setting 
up a “feedback loop”. The amount of feedback is then controlled with a Resonance parameter on the 
front panel of the instrument.

When you apply resonance, the frequencies just around the cutoff point of the filter will be emphasized 
(louder). As you increase the Resonance further and further, the filter will start to behave more an more 
like a bandpass filter, where only the frequencies around the cutoff point are let through. The filter will 
start to “ring”, which means it almost sounds like it is adding frequencies to the sound. If the Resonance 
is then raised even further (on some synthesizers) the filter will start to self-oscillate, that is produce sound 
of its own, just like an oscillator.

High Resonance values are also visible in the waveform. They appear as a “superimposed” waveform with 
a frequency equivalent to the filter’s cutoff frequency. The three examples above show the same wave with 
increased resonance.

If you add Resonance to a sound and then vary the Cutoff frequency (for example with an envelope) you 
will get a very typical synthesizer sound.