Most ATAPI drives use a 4-in-one or 5-in-one connector. Cheap and it provides power, atapi,jumpers, SPDIF, etc. The ATAPI connector, if not part of a connector unit, can be located anywhere on the drive. SATA has a specific location for power and signal connectors and is designed for plugging into trays or backplanes. Since SATA is primarily geared for OEM and VAR installations, mainly in server applications, and designed for backplane and tray installation, audio is an unnecessary feature/cost option.