If you switch to my other DTH for this device (Aeotec Doorbell), you can use the Play Track at Volume command in CoRE and it will automatically set the volume, play the track and then restore the volume.
If you do switch to the other one, you may have to change some things because it uses “switch.on” to detect/ring the doorbell instead of button 1 pushed.
You may also want to try the other version.