XPSpeak 4.1 is a free, lightweight Windows application developed by for the analysis and peak fitting of X-ray Photoelectron Spectroscopy (XPS) data. It is widely used in materials science for deconvoluting complex spectra to identify elemental compositions and chemical states. Core Capabilities
You can download the software from these known repositories: University Archive (Washington State University) Scudiero Group Document xpspeak41 software download
: Allows for Gaussian, Lorentzian, and mixed (Gaussian-Lorentzian sum or product) peak functions. Parameter Constraints XPSpeak 4
It typically worked by taking from a radio receiver’s speaker or discriminator output, then decoding the tones/signals into readable text. The “41” in the name suggests it may have been a later build or fork from earlier XPSpeak versions. XPSpeak 4.1 is a free