Low maximum volume with Plantronics Blackwire 315.1

Dear Linux folks,

On the Intel Kaby Lake laptop Dell XPS 13 9360, using Debian sid/unstable with Debian sid/unstable and Linux 6.17.0-rc2-00053-gb19a97d57c15, connecting the USB headset Plantronics Blackwire 315.1, even turning the volume on the headset control (or GNOME, both are linked) to maximum, the volume is still very low. `pavucontrol` shows everything on 100 %.

Is that a driver problem, or somehow a hardware property?

I uploaded the files done by `/sbin/alsa-info` [1].

Kind regards,

Paul

[1]: https://alsa-project.org/db/?f=ccc9945a112e88c7b6bf29ecc072f05e0cb72f3f