Understanding "Zip audio non filtré" (unfiltered audio zip) requires looking at how lossless compression works across both Windows and macOS. When audio is stored in a ZIP archive, it is by definition "non-filtered" or "unfiltered" because ZIP is a system. Core Concepts of Unfiltered Audio Zips

: Unlike audio-specific lossy filters, ZIP compression algorithms look for patterns in data to encode it more compactly without discarding any information.

: You cannot "play" audio directly from a ZIP file without some form of extraction or a specialized tool that decodes the compressed data stream in real-time. Cross-Platform Handling [WiN-OSX]

The term "unfiltered" in this context usually refers to the fact that the audio data is preserved bit-for-bit without the frequency removal (filtering) that occurs in lossy formats like MP3 or AAC.

While the compression itself is the same, how each operating system handles these archives differs significantly:

: Compressing song folders into a .zip file has no effect on audio quality.