pop

Processors & DSP Beder Aug 22, 2026 00:00 1 replies Original on forum ↗

Thread Summary

The user experiences a popping noise when powering on and off the ADAU1466 board on SigmaStudio 4.7. The recommended solution is to implement an external mute circuit controlled by a GPIO from the DSP or a system controller to mute the audio during power transitions.
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Beder Question

Aug 22, 2026 00:00

Hello,

I am using ADAU1466 on SigmaStudio 4.7

When power is connected to the board, it turns on, but a slight popping noise occurs at startup as well as at shutdown.

How can I prevent this from happening?

Thanks.

software

sigmaStudio 4.7

processors and dsp

Processors and Microcontrollers

pop

adau1466

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DaveThib Reply

Aug 24, 2026 00:00

Hello Bedar,

I am afraid our eval boards were designed to be low costs so we did not add any extra features. What would be needed is a mute circuit external to the codec so that the audio can be muted before shutdown and would be muted at powerup. Then use GPIO from the DSP or a system controller to control the mute.

Dave T

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