There was a download of PSP 84 1.5.2 on the developer's website when we last checked. We cannot confirm if there is a free download of this software available.
The most frequent installer filenames for the program are: Adrenaline.exe, AVSVideotoPSP.exe, iun6002.exe, PSPVideoManager.exe and PSP_MixPack_Registration.exe etc. The software is included in Multimedia Tools. The most popular versions of the software 1.5, 1.4 and 1.1. We cannot guarantee that the program is safe to download as it will be downloaded from the developer's website. Before launching the program, check it with any free antivirus software. This program is a product of UFox.
From the developer:
PSP 84 is a high-quality processor, capable of producing a wide variety of delay-based effects. Two independent delay lines operating with variable sampling rate and precise tape saturation algorithm with adjustable gain, allow for convincingly sounding simulation of tape delay, including all the exciting effects resulting from tape speed instability.
You may want to check out more software, such as WGS-84 Calculator, Boeing E-767 84-3504 Japan ASDF FSX & P3D or TI-SmartView™ CE for the TI-84 Plus Family, which might be similar to PSP 84.