Soundpost adjustment effect on violin radiativity & admittance, Joseph Curtin/Luca Jost Nov 7, 2025

Adjusting soundposts is central to workshop practice, and yet there has been almost no research into the acoustical effects of these adjustments. This changed with Jim Woodhouse’s recent modelling of the soundpost. At the 2025 Acoustics Workshop (held at the University of Michigan in Ann Arbor) we followed up with experiments testing the effects of changing soundpost length, position, and angle on violin radiativity and admittance. In this presentation, Curtin and Jost look at the sometimes-surprising results and consider their workshop implications. 2:04 Bridge Height 5:52 Soundpost Diameter 8:17 Adjustable Soundpost with Magnetic Tracking 11:03 North-South Soundpost Adjustments 27:41 East-West Soundpost Adjustments 37:42 Soundpost Length 39:29 Crooked Sounpost 45:26 Questions & Discussions 1:09:47 Soundpost Length with Anima Nova Soundpost