This weekend in local music features the return of OzMoMu, plenty of opportunities to rosin up the bow, and a few birthdays. Wednesday, Jan. 16 Reverend Hylton at Chelsea's (Eureka Springs) - 8:30 p.m. Thursday, Jan. 17 Ozark Mountain Music Festival at Chelsea's, Basin Park hotel (Eureka Springs) - Thursday and Sunday tickets are $10, Friday tickets are $30, Saturday tickets are $40 4-day passes are $55, Thursday through Sunday Mountain Sprout at George's Majestic Lounge (Fayetteville) - $10, 9