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UAC2.0: Typically used for players, phones, and PCs. On Windows, download the
FiiO driver from:
https://forum.fiio.com/note/showNoteContent.do?id=202105191527366657910&t
id=17 .
Supports PCM44K–768K, DSD64–DSD512, MQA. macOS does not require
drivers.
Language: Supports Chinese, English, and Japanese.
Reset Options:The K15 allows partial resets for network settings, EQ, Bluetooth,
song library, etc., or a full "Restore Factory Settings" to revert to the original state.
Others: Includes Press the volume knob, FW update, reset options, and factory
debugging.
1.Press the volume knob: Set to toggle screen on/off or mute/unmute.
2.FW Update: Includes SOC online update, SOC local update, and MCU update.
The K15 employs a dual-master architecture:
SOC handles local playback, streaming, VU meter calculations, UI display, and
operations.MCU manages power control, mute functions, DAC control, PEQ
adjustments, etc.
Thus, separate firmware upgrades are required for the SOC and MCU.
(1)SOC Online Upgrade:
When the K15 is connected to the internet, this setting allows online updates to the
latest SOC firmware. If the SOC already has the latest version, a prompt will indicate
no update is needed.
(2)SOC Local Upgrade:
20