Customize Garmin Varia Alert Volume

While having a garmin varia radar connected, it would be useful if I could customize the volume in which alerts are given in relation to the volume e.g. my music. Especially when listening to music very loud, the alarm from varia is even louder when having volume in locus maps configured to media, which is not necessary, it is even frighteningbecause the alarms are too loud in relation to the music volume. I dont like the configuration in locus, binding the volume to the ringtone volume because I want my phone all day being noiseless, only vibrating.