Every key on your QWERTY keyboard can be mapped to a sound file.
The only way to guarantee you have a legitimate, fully functional, and safe version of Soundplant is to use the official channels. Here's how: soundplant registration code
In terms of technical details, maybe explain that registration codes are typically alphanumeric strings validated by the software during activation. The code could be tied to the user's machine or account, depending on Soundplant's implementation. Every key on your QWERTY keyboard can be