![]() ![]() ![]() The shape of the envelope dictates whether the note is percussive and abrupt, or if it swells in and eases out slowly. You strike a key, the key triggers a gate which launches an envelope, and this opens the VCA so we hear the note. The most common use it provides is to shape the volume of a synthesizer voice using an envelope. Basically this means that it uses a voltage signal to control the amplitude, or volume, of a second signal. Just to make sure we’re all on the same page from the start, a VCA is a voltage controlled amplifier. ![]() In any event, it’s worth taking a look at what VCAs are, what they do, and why they are so important to any eurorack system. ![]() Depending on your experience with synthesizers, this may seem like either an odd or completely self evident statement. If you’ve spent any time investigating the world of eurorack, reading through threads on the muffwiggler forum, watching videos from Richard Divine, Mylar Melodies, DivKid and the growing roster of eurorack YouTubers out there, chances are high that you have come across the sentiment that you can never have too many (or enough) VCAs. ![]()
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