Any audible differences are often tied to the provenance of the recording. With streaming platforms, the source of a given album or track isn’t always transparent, which can lead to wide swings in sound quality, from mediocre to exceptional.
With a personal library, you’re in control. Every album in my collection (over 600 DSD albums) has been carefully curated, with full awareness of its origin and mastering and that consistently translates into better SQ. I often tap into my library rather than relying on same material streamed through Qobuz.
Another reason stored files can sometimes sound better is the simplicity of the signal path. With local playback, you eliminate network traffic altogether, no congestion and reduce exposure to potential EMI in the chain. Even though streaming delivers data error-free, a shorter, cleaner path can translate into a more relaxed presentation.

