ValidSoft recommends at least one tuning phase during the actual pilot/production setup under controlled conditions with a pilot group of users. We recommend using 300+ individuals to perform at least one enrollment and one verification call on multiple days; the more the better. These calls should be done under controlled conditions where no impostor tests or other negative tests are performed. The audio can then be used to create enrollment and evaluation sets with significant true and false trials similar to how NIST evaluation datasets are designed. Thresholds are adjustable and typically operate at a 1-5% difference in FAA/FRR based on customer’s preferences surrounding security and user experience.