How do Bluetooth headsets adjust the volume at the circuit level?

一沙一世

How do Bluetooth headsets adjust the volume at the circuit level? [Copy link]

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How do Bluetooth headsets adjust the volume at the circuit level?

feifei2025

Unless the Bluetooth headset itself has plus and minus buttons, the volume is usually controlled by connecting to a mobile phone.

zhaoweige

feifei2025 posted on 2024-10-20 11:53 Unless the Bluetooth headset itself has plus and minus key functions, the volume is generally controlled by connecting to a mobile phone

He must be asking about the volume up and down buttons on Bluetooth headphones. Otherwise, how can you adjust the volume besides connecting to the device?

tagetage

The Bluetooth chip has a DAC, which directly controls the DAC output amplitude.

chineseboyzxy

For some headphone volume adjustments, you can choose to link or not link. Linkage means adjusting the volume of the phone, while non-linkage means only adjusting your own volume.

吾妻思萌

Do you want to design a regulating circuit? No knobs or anything.

chunyang

The command controls the DAC output amplitude, which is essentially controlling the circuit gain. It is essentially the same as the traditional potentiometer control, but the means of implementation are different.