Yamaha P-515 "Digital Piano Micrphone" Low volume

Hey, i’m having p-515 i installed “Yamaha Steinberg USB driver 2.1.5” driver.
The driver installing a microphone that is broadcasting my piano plays on that driver, now the problem that the volume of this microphone driver is very low, so when ever i’m playing on that and someone listen to me, it’s very low volume, there is a to fix it and increase the volume?