Sunday, February 8, 2026

Noise No More

An achilles heel of the Casio CZ-101 (and the electrically identical CZ-1000) is the amount of noise and interference it produces on its headphone port, which is curiously not present on the line out port. In this video I explain why it happens and present a fix that dramatically reduces the noise by just swapping the values of a few passive components.

This fix really improves the usability of this synth, and it's honestly kind of embarrassing that Casio let this system out the door with such a boneheaded design fault.

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