Yea, those aren't it. definitely running a DMR system that uses more than one frequency.FCC Callsign WQMI674 (SLEEP TRAIN AMPHITHEATRE - A LIVE NATION VENUE)
https://www.radioreference.com/apps/db/?fccCallsign=WQMI674
Yuba has one frequency license for repeater at the amphitheater.
FCC Callsign WPMG664 (YUBA, COUNTY OF)
https://www.radioreference.com/apps/db/?fccCallsign=WPMG664
FCC Callsigns within 4 Miles of N 39.0311 W -121.5130
https://www.radioreference.com/apps/db/?action=fccProx&lat=39.0311&lon=-121.5130&r=4
Toyota Amphitheatre
Former names:
Sacramento Valley Amphitheatre (2000-02)
AutoWest Amphitheatre (2002-2003)
Sleep Train Amphitheatre (2004-2015)