what is live-spectrogram-player fr?

Live Spectrogram Player is a Windows desktop app for playing audio files while watching a live, scrolling visual map of the sound called a spectrogram. A spectrogram shows which frequencies are present in audio over time, drawn as a heatmap, similar in style to a well known tool called Spek. Beyond just playing a file, the app can also draw a live spectrogram from a microphone input, from whatever sound is currently playing through your speakers, or from a physical audio cable routed back into a sound card, which lets you check what your speakers or audio equipment are actually outputting rather than what the software intended to send. The README explains several practical audio routing notes for anyone comparing different sound sources. For example, listening to the speaker loopback signal is usually the easiest way to check how audio sounds after any processing effects are applied, while the raw sound card input and the speaker loopback can look different because they represent different points in the path the audio takes before reaching your ears. For sound cards that apply hardware level effects not captured by the normal loopback, the app supports routing the physical output back into a multi channel audio interface instead. To keep the app responsive, spectrogram drawing happens in the background rather than freezing the interface, and it automatically pauses briefly while you move or resize the window so dragging feels smooth. Audio files are checked for safe file size, channel count, and sample rate before loading to avoid accidentally loading an unreasonably large file into memory, and very high sample rate files are automatically converted to match your output device. The app has a dark themed interface built with CustomTkinter, a Python library for building desktop windows, and it includes a PowerShell script that packages it into a single Windows executable file for easy distribution, or a folder based release, using PyInstaller. The README does not mention a license for this project.