RAM Playback
RAM Playback means a server explicitly loads a track or album into working memory before playing it, rather than relying on continuous reads from the library drive for that material.
It is a specific playback feature, not another name for having RAM or using an ordinary streaming buffer.
RAM Playback — Music Server
On a music server, check how much content is loaded, which formats and playback modes use the feature, and whether its memory allocation limits the duration. Track-level and full-album loading describe different amounts of material.
A figure for total system memory does not establish RAM playback. Nor do an operating system running from RAM, a system RAM disk or an SSD music cache: these describe different uses of memory or storage.
The feature can change when the library drive is accessed, but does not by itself prove an audible improvement or independence from the network. Use the manufacturer’s stated playback behaviour; silence about it means unknown rather than absent.