Hello, been having this issue the last couple of days. While playing, the volume will randomly change..nothing real dramatic, maybe a 10% - 15% change, but it’s noticeable and forces me to change it from the master vol. knob while performing without the dancers noticing. At first I thought it may be my jbl powered monitor, or a mixer issue, as I don’t have the problem when at home using headphones, but today I payed attention, and my singing didn’t change volume, just the keyboard. It changes both the sequence volume and the piano volume I’m playing live. Any help would be appreciated,