To help you find the exact file you need, could you tell me: What is the (e.g., C-450, C-650)?
: Check the website of the retailer where you purchased the keyboard (such as Nos Keyboard Software Download
If you want, I can: 1) expand this into a full paper with literature citations and experimental results, or 2) draft a lab protocol and scripts for the technical analysis described. Which would you like? To help you find the exact file you
(Results would be reported in a full empirical paper; this draft omits specific findings pending a build to analyze.) Nos Keyboard Software Download