NW-MS9

The NW-MS9 is a second-generation Memory Stick Walkman that served as a smaller-body revision of the original NW-MS7. It uses a 64MB Memory Stick for storage and supports ATRAC playback, with an LCD display showing track details. It represented the ongoing pre-built-in-flash phase of the Memory Stick family as Sony refined the removable media concept.

A smaller follow-up to the original NW-MS7, it was built to make Sony's first digital Walkman idea feel less bulky and a little more everyday. It still relied on removable Memory Stick media and ATRAC playback, so the overall workflow remained firmly tied to Sony's early transfer-and-software ecosystem instead of anything close to drag-and-drop simplicity. The real change was not philosophical so much as physical.

The player became more compact and easier to carry, but it still belonged to the same transitional moment where solid-state audio was being treated as a digital substitute for discs instead of a fully self-contained category of its own. It worked best as a refinement of the first idea. Sony was still figuring out how compact and practical a file-based Walkman could actually become.