A prototype intro for Springi with this music was uploaded to YouTube back in 2011. A few years later, a former PDX employee reuploaded it, but in slightly better quality, and with the title “prt_demo_96” and with no visuals. I assume “PRT” stands for “Paratoons”, an unused rebrand for OJToon that was reworked into PDXToon.
credit to wyatt for the lore and discovery for the original music