From the course: Learning Modular Synthesis

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Filter resonance (feedback)

Filter resonance (feedback)

From the course: Learning Modular Synthesis

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Filter resonance (feedback)

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- Let's play around with another way that we can change a filter's response, namely by playing with its resonance. Resonance is feedback inside a filter, the output coming back to the input. The result is the harmonics, right around that cutoff, the corner frequency, gets strengthened rather than the ones beyond just being reduced. You get a strange vocalish vowelish sound as a result. It's a very distinctive sound, I'm sure you've heard before. Also what's interesting is resonance is different from filter to filter. Some of them go into strange distortion, some of them actually start oscillating and become a sine wave all by themselves. Let's play around with resonance on our two filters here and compare their differences and also see what happens to the harmonics as we play with resonance. I've already set up a simple patch with two oscillators going into the Roland filter to start off with, gate triggering both of our envelopes, one of them patched to modulate the filter's cutoff…

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