Headphone volume control not working - ZenFone 8

[chrisbepost]

Hi there,
I have a Sennheiser PMX 685i wired headphone. It connects via the 3.5mm jack and has an inline microphone and controls. The play/pause button is working fine. However, the volume up/down controls aren't working. How can I enable volume control via the headphone on the ZenFone 8?

[ASUS_Bot]

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