source by sound

It looks like both Ohio State University and the University of Delaware tested Source on Corn in 2023. Neither saw a statistical benefit from Source, but both studies did notice slightly higher yields when Source was used. Ohio State data on page 58 (https://digitalag.osu.edu/efields) and U. of Delaware data here (https://sites.udel.edu/agronomy/2024/02/15/udbiologicals23/). If you're looking for a product designed to have a similar effect, FBN carries Catalyst ADV and has done jar tests to show that it is compatible with both N and P fertilizers.