The file is a compressed archive containing custom rhythm and accompaniment patterns (styles) specifically designed for the Yamaha PSR-S900 arranger workstation . These "styles" allow the keyboard to automatically generate a full backing band—including drums, bass, and orchestral parts—that follows the chords you play with your left hand. How to Use These Styles
The file format is a Yamaha‑specific binary layout (often identified by the extension ). While the exact structure is undocumented publicly, reverse‑engineering efforts have shown that each style consists of a header, a series of “track blocks,” and a table of chord‑mapping data. STYLE YAMAHA PSR S 900 1.rar
: Use a utility like WinRAR or 7-Zip on your PC to unzip the file. You will typically find one or more .STY files inside. The file is a compressed archive containing custom