After installation and setup, you are ready to start testing.
The original developer hosted the file on now-defunct forums like Tapeheads.net and AudioKarma.org . The most trustworthy version is typically named or NakT100_Setup.zip .
A good first project is to verify your computer's sound card loopback, which involves:
While primarily focused on turntables, their auxiliary forums frequently share documentation for vintage test gear used to calibrate tape heads and phono cartridges.
Though designed for room acoustics, its RTA (Real-Time Analyzer) and signal generator tools are incredibly powerful for bench-testing electronic gear.