DS1881, a clickless dual digital attenuator

Article excerpt

The AUDIODiWHY blog writes: I’ve breadboarded digital potentiometers before, only to find they make an ugly, audible “click” when changing resistance values when used in 30hz-20Khz AC circuits. I recently stumbled upon an IC that purportedly does away with the click, Analog Device’s DS1881, dual pots, I2C, log response, everything needed for an MCU controlled audio attenuator, but also sporting onboard hardware to detect AC zero crossings (like an old Akai sampler?) and change its resistance values quietly. TLDR: Does the DS1881 work as advertised? Yep.  Nice! See how an eval board was spun up to test it in the post here.