As a teacher and a professional violinist, a "sound" adjustment to my instruments is crucial in my musical life. When it comes to a soundpost or bridge adjustment, Patrick Tsai is the BEST in this area in Orange County and Los Angeles. I could drive to LA to the big shops, but Patrick's work is impeccable and first-rate. He takes time with each customer, whether they are professionals or students, to ensure their instrument is sounding its best. I have taken 2 years of violinmaking at Indiana University and know great worksmanship when I see it. I highly recommend Patrick Tsai's services to anyone here who needs their instruments to sound their very best!!!!