https://professionalsoundalliance.org/signatories/douglas-price/2026-09-01T19:01:04+00:00https://professionalsoundalliance.org/signatories/jeremy-siegel/2026-09-01T19:29:05+00:00https://professionalsoundalliance.org/signatories/pierre-langer/2026-09-02T19:18:56+00:00https://professionalsoundalliance.org/signatories/mark-mangini/2026-09-10T18:16:36+00:00https://professionalsoundalliance.org/signatories/craig-nimens/2026-09-03T16:27:11+00:00https://professionalsoundalliance.org/signatories/karol-urban/2026-09-10T18:16:21+00:00