CV Input vs Expression Input
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The DIY forum is for personal projects (things that are not for sale, not in production), info sharing, peer to peer assistance. No backdoor spamming (DIY posts that are actually advertisements for your business). No clones of in-production pedals. If you have concerns or questions, feel free to PM admin. Thanks so much!
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Teej212
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CV Input vs Expression Input
Can anyone tell me what the difference is? i am sill a bit confused on this subject. I want to have some (cv or expression) inputs and outputs on some pedals im building, but i dont really know enough about the subject to do it.
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autopilot
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Re: CV Input vs Expression Input
CV is control voltage, so the parameter is adjusted via the voltage (0 to 5 or 0 to 9, it varies), while Exp the parameter is adjusted via a resistance, some expression jacks are wired to accept both, for example having a stereo jack the Tip is the voltage in, Ring is positive and sleeve is ground, if you plug a expression (stereo plug), the tip will receive a voltage depending on the position, or if you plug an external voltage generator with the tip being the voltage, the ring should be empty to avoid malfunctions and the sleeve ground so the device recognizes the voltage variations. In synths also there's the bipolar voltage variations, so one source changes 2 points at the same time, 5, ground and -5, so when when the signal is at 5, lets assume the value is at his highest value, in the meanwhile the other point is a its lowest, when the signal is at 0 both points are at half of their values.
What determines what to use is the circuit and since there's a lot of variations on the wiring style and specs, also filtering it makes hard for a standard method in the guitar world. The advantages of cv is that its easier to distribute, so you can sync more devices from one out (lfo, envelope adsr, etc) while with normal resistance is more complex to sync different devices from the same source
What determines what to use is the circuit and since there's a lot of variations on the wiring style and specs, also filtering it makes hard for a standard method in the guitar world. The advantages of cv is that its easier to distribute, so you can sync more devices from one out (lfo, envelope adsr, etc) while with normal resistance is more complex to sync different devices from the same source